Set sequence number in msg_heartbeat, which is sent to drone
Add correct .gitignore
Revert "Set sequence number in msg_heartbeat, which is sent to drone"

This reverts commit c01bc339e16f41c382e4c9b64ddbdf58eee4c6e8.
Merge branch 'master' into fix-mavlink-message-sequence-number
Fix sequence number for all MAVLink packets
Update Radius of earth
Fixed Unit Test
Merge pull request #1001 from TShapinsky/issue_842

Correct Area calculation method
Implemented gray drone on heartbeat loss
added handling for 'null' gps position
GPS returns null instead of 0,0 for default location
Merge pull request #1002 from TShapinsky/issue_497_grey_drone_on_disconnect

Implemented gray drone on heartbeat loss
Fix english typos
grouping strings
Added more german language strings
Merge pull request #1004 from squilter/more_german_strings

More german strings
Merge pull request #956 from alextel69/fix-mavlink-message-sequence-number

Set sequence number in msg_heartbeat, which is sent to drone
refactoring of the mavlink connection class structure.
Several core utilities not dependant on android were moved to 'Core'.
The restructuring should also fix a persistently annoying 'save to log' bug, which i think might have been the result of a race condition.
bug fixes.
bug fixes.