Cleanup, better Project structure, Nuget enabled

If nuget doesn't restore the packages with the first build, download [nuget.exe](http://download-codeplex.sec.s-msft.com/Download/Release?ProjectName=nuget&DownloadId=757017&FileTime=130290366297630000&Build=20841) and add its path to the windows Path environment variable.

now you can do from cmd:

'nuget.exe update -self 
nuget restore'

VVVV.Nodes is still referenced to a local vvvv installation.