Add the desctructor definition
complete the routine for all available serial ports: 1, 2 and 3
Merge pull request #8 from spdin/rc

Merge unit-test_rc
change set_pose() to include char lon and char lat
alteration due to changes in gps_data.h
add yet another test code from libmaple
test sending gps data via xbee
fix issue: Incomplete README for /flymaple
not to ignore an empty bin dir
add inc dir for /rc
Merge pull request #9 from tttor/unit-test_xbee-gps

Unit test xbee gps
Merge remote-tracking branch 'upstream/master'
change libmaple library compatibility
change rc library
add sensor library
Merge pull request #10 from spdin/change_libmaple

Change libmaple from version 2012 to version 2010 due to incompatibility with STM32F1 RET6, especially for i2c routines.
Merge pull request #11 from spdin/change_rc

Change rc-related routines: its structures (file location)
Merge pull request #12 from spdin/sensor

On-board sensor routines.