Added 'AutopilotWarningParaser' interface. It'll be used to provide platform specific implementation warning parser implementation.
Added a 'AutopilotWarningParser' field to the Drone State component.
added stub android implementation of the 'AutopilotWarningParser' interface.
update source compatibility to java 1.7
Merge branches 'ap_message_handler' and 'master' of github.com:DroidPlanner/3DRServices into ap_message_handler
completed implementation of the autopilot warnings parser.
Merge pull request #13 from DroidPlanner/ap_message_handler

Autopilot warnings parser