* Update gitignore added JetBrains, LiteIDE and other exclude files
* Added example of proxy realisation
* Update proxy description with simple example
* Update showcase with description, small refactore of code
* Update proxy doc
* Added comments in example proxy also added link to go play sandbox
* Small improvement of proxy example
* Update link for play golang
* Corrected mistakes, splited user validation in proxy
* Updated link to play golang and some mistakes
