Visual Studio 13 Support

CMake change: NO Explicit shared library
ReadBit:
- Visual Studio 13 requires explicit type conversion
- different rounding behavior requires careful value clamping
Improve CMakeLists to be nice to both Windows and the rest of the world
Chilitags on VS 13 again

ReadBits
	- tested chilitags with round, floor and no operation
	- round gave best results, same performance for VS13 and linux

CMake for test data
	- added the static library to link as well