Merge pull request #50 from denniszhuo/master

Updated lib and command line application
linux: fix build
app: compiler warnings
OSX: update so it should build again
cmdline: commented out DEBUG output option
linux: system, check status of tx_pipe read
linux: makefile, clean on console app makefile also does clean on avdecc-lib
linux: netif module, correct selected interface index
Merge pull request #51 from andrew-elder/master

pull
Updated README file.
controller:app: Fixed error for command status name not being initialized.