Merge pull request #40 from OneGet/wip

Added new test module
Merge pull request #41 from OneGet/wip

Changes: Removed old nuget provider, integrated unified nuget+onegetprovider into main build, moved test providers into test project and migrated to .NET 4.0 (instead of 4.5.1)
First set of BVT tests
merged with main
Merge pull request #42 from alokin8/master

Added new testws
added xunitextensions project