Merge pull request #18 from denniszhuo/master

Major update for AVDECC Controller library
controller: linux additions
controller: lib: keep the rx_frame as const char * through the rx processing path
controller: lib: linux build updates
readme update
controller: app: use standard for loop construction
controller: notification print, use %p for pointer type
controller: lib: linux: system class updates to get it to compile and link
Merge pull request #19 from andrew-elder/master

linux build updates
controller:lib: Updated Controller formatting.

controller:app: Implemented command line help class.