controller:lib: Added error checking for when dereferencing descriptor
objects.
controller:lib: Updated AVDECC Controller class to remove non public
functions from the API. Removed notification flag variable from
received packet processing functions.
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