added mavlink version to the State class.
added extra used to retrieve the mavlink version during a HEARTBEAT_FIRST or HEARTBEAT_RESTORED event.
Merge branch 'master' of github.com:3drobotics/3DR-Services-Library into dp_3dr_services
added invalid mavlink version constant.
Merge branch 'master' of github.com:3drobotics/3DR-Services-Library into dp_3dr_services
added a proxy class to abstract calls to the DroidPlanner api.
completed update of the ParamsFragment class.