UnsupportedPixelFormat bitDepth=16

[heppth]

First of all, thank you for this awesome project. The implementation is great.

After testing the library with different servers and devices I got a UnsupportedPixelFormat error. I attached the debugger and these are the locals of VncPixelFormat constructor

		bitsPerPixel	16	int
		bitDepth	16	int
		redBits		5	int
		redShift	11	int
		greenBits	6	int
		greenShift	5	int
		blueBits	5	int
		blueShift	0	int
		isLittleEndian	true	bool
		isPalettized	false	bool

Could I know a bit more why bitDepth=16 is not supported. If I understand it, I may be able to contribute to this project.