Cleaned up linuxradiodrv code
Added better error handling to linuxradiodrv transmit()
Using MAX_PACKET_SIZE where appropriate in linuxradiodrv
Better failure handling in linuxradiodrv
Cleaned up and re-formatted source of linuxradiodrv
Fixed missing #includes and restricted linuxradiodrv compilation to linux
Extracted linuxradio dvice name to contiki-conf
Fixed linuxradio compilation issues with native and minimal-net