Import the MAVLink
Makefile: add the mavlink files
Create task "ground_station_task"
Modify the implementation of the function "send_package"
Add file mavlink_types.h into the "mavlink" directory
Enable the Ground Station mode
Add some simple test of the MavLink
Send the attudude data through mavlink
Merge pull request #97 from shengwen1997/mavlink

Mavlink