Daemon: use 16 bit precision Colors internally
Daemon: rename SetMessage to LowPrecisionSetMessage
Daemon: add HighPrecisionSetMessage

This makes it possible to specify colors using 16-bit precision.
Opcode 0x03, payload bytes: mlRrGgBbAa (m: module, l: led).
Document the new 16-bit set-led command
Add 16-bit color support to python binding
Add some comments
Set python binding version to 0.3.0