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
Merge branch 'master' into dev
Merge pull request #181 from scriptcs/dev

Ship v0.3.0
Update version to v0.3.0
Merge branch 'dev'

* dev:
  Update version to v0.3.0
Update version to v0.4.0-alpha
Adding EXEs as valid assemblies.
Updated Autofac/MEF integration to 3.0.1 (resolving issue outlined in #182).
Merge pull request #184 from ianbattersby/IncludeExeAsRefs

Include EXE and lift AutoFac/MEF integration
Manually specify the dependency version numbers in chocolateyInstall.ps1
Increment version number to 0.3.1
Merge pull request #190 from jrusbatch/issues/159

Manually specify the version number for dependencies in chocolateyInstall.ps1