Add "OpenSeadragon contributors" copyright statement

The license text will be provided on the website, etc., and it seems
strange to list no copyright date newer than the original CodePlex
copyright from the AJAX Control Toolkit.  Add a blanket copyright
statement for contributions to the OpenSeadragon project, stating that
copyright is held by the authors of each contribution.  This blanket
statement is not intended to preclude individual contributors from
attaching their own copyright statements to their modifications.

LICENSE.txt

@@ -1,4 +1,5 @@
 Copyright (C) 2009 CodePlex Foundation
+Copyright (C) 2011-2013 OpenSeadragon contributors
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

src/button.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/buttongroup.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/control.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/controldock.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/displayrectangle.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/drawer.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/dzitilesource.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/eventhandler.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/fullscreen.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/iiiftilesource.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/legacytilesource.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/mousetracker.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/navigator.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/openseadragon.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/osmtilesource.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/overlay.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/point.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/profiler.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/rectangle.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/referencestrip.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/spring.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/strings.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/tile.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/tilesource.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/tilesourcecollection.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/tmstilesource.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/viewer.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are

src/viewport.js

@@ -2,6 +2,7 @@
  * OpenSeadragon
  *
  * Copyright (C) 2009 CodePlex Foundation
+ * Copyright (C) 2011-2013 OpenSeadragon contributors
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are