Update CONTRIBUTING.md

Updated CONTRIBUTING.md to specify that the `this` keyword should be avoided.
Fixes #35: Solution file should be located in the root of the repository
Update README.md
Update README.md
Update README.md
Update README.md

Add links to Google Groups and JabbR
Update README.md

Add a link to the samples repository
Remove samples directory
Merge branch 'master' of github.com:scriptcs/scriptcs

* 'master' of github.com:scriptcs/scriptcs:
  Update README.md
ScriptCs.exe returns an exit code, so ERRORLEVEL env. variable can be used to check result
added nuget -install and command factory
added command tests,
Merge branch 'dev' of https://github.com/scriptcs/scriptcs into dev

Conflicts:
	src/ScriptCs/Program.cs
added support for local nuget.config
committing missing tests
Merge pull request #130 from paul-sh/dev

ScriptCs.exe returns an exit code
Merge #130

Conflicts:
	src/ScriptCs/Program.cs
Reset the CommonVersionInfo file content
Use all lowercase characters for the chocolatey package ID
Rename Scriptcs.nuspec to scriptcs.nuspec
Paths should not be declared using static functions