Merge github.com:JoschaMetze/Protobuild

Conflicts:
	Protobuild.exe
	ProtobuildManager/bin/Debug/ProtobuildManager.exe
Merge branch 'master' of github.com:hach-que/Protobuild
Merge remote-tracking branch 'JoschaMetze/master'

Conflicts:
	Protobuild.exe
	ProtobuildManager/bin/Debug/ProtobuildManager.exe
Prevent empty .nuspec files from being created.
Merge pull request #3 from hach-que/master

Merge back changes from hach-que:master