Merge pull request #475 from vladislav-karamfilov/master

Implemented Java code execution
Added IP Address of the user when submitting code
Merge pull request #477 from vladislav-karamfilov/master

PHP execution strategy implemented and other improvements
Update README.md
Update README.md
Latest changes from TFS synched. From now on all code changes will be pushed to GitHub.
Added unit tests for PascalCaseToText and ToInteger string extension methods
Updated version number
StyleCop violations fixed