added Pure-C# Blob classes (incomplete)
Validates old blob == new blob
Merge branch 'master' into PureCSharpBlob

Conflicts:
	src/OpenCvSharp.Blob/CvBlob.cs
	src/OpenCvSharp.Blob/CvBlobs.cs
	src/OpenCvSharp.Blob/OpenCvSharpExtern.dll
	src/OpenCvSharp.CPlusPlus/OpenCvSharpExtern.dll
	src/OpenCvSharp.MachineLearning/OpenCvSharpExtern.dll
	src/OpenCvSharp.Test/OpenCvSharpExtern.dll
Merged with master
added Blob tests
Minor update
Merge branch 'PureCSharpBlob' of https://github.com/shimat/opencvsharp into PureCSharpBlob
Added LabelData
Fixed RenderBlob bug
MSTest -> NUnit
moved implementation of FilterLabels, FilterByArea, GreaterBlob and GetLabel to CvBlobs
Modifying BlobMeanColor
minor updates
added ContourConvexHull
added CvContourChainCode.Render
added CvContourPolygon.Render
added CvContourPolygon.Area
added CvContourChainCode.Perimeter
added CvContourPolygon.Perimeter
added CvTracks.Render