adding chocolatey nupkg. This bundles all Scriptcs assemblies in a scriptcs nupkg. The ChocolateyInstall will copy them to `$env:appdata\scriptcs, use nuget.exe to install nuget.core and roselyn assemblies and will then add $env:appdata\scriptcs to the path.
Merge branch 'dev' of git://github.com/scriptcs/scriptcs into dev
adding powerargs to nugets that chocolatey needs to manually pull from nuget feed
Merge pull request #119 from mwrock/dev

Create chocolatey package