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
Migrating to use Autofac for internal dependencies and MEF 4.0 for external
adding powerargs to nugets that chocolatey needs to manually pull from nuget feed
Merge pull request #118 from glennblock/117

Migrating to use Autofac and MEF 4.0
Merge pull request #119 from mwrock/dev

Create chocolatey package
Merge remote-tracking branch 'upstream/dev' into script-pack-changes