Some work on serialisation within vvvv

This pull request is twofolded

1. it has added DataContractAttributes to VMath structs and RGBAColor, so they serializes more efficiently with e.g. Json (no redundant data in the result)
2. it enhances the OSC routines in Utils.OSC to comply with extended OSC Specs 1.0 ( http://opensoundcontrol.org/spec-1_0 ), namely Blobs, Timestamps and Colors are now fully supported.