pass MAVLink instance to packing functions, consider system, component and sequence for packing, update tests
updated readme
Removed protobuf hacks. Fixes #22
Clean up mavlink system struct. Fixes #238
Remove old, unmaintained files
Fixed CSV extraction bug in mavlogdump.py.

Occurred when multiple messages in the same timestep had the same field
names.
Support other dialects for mavgraph.py.
Add MAV_CMD_DO_LAND_START for marking where landings start in missions.
Merge pull request #275 from mday299/do_land_start

Add MAV_CMD_DO_LAND_START for marking where landings start in missions.
ardupilotmega: added gripper command and enum

from Randy
pymavlink: cope with empty DF messages

this copes with copter STRT message
mavtomfile: avoid loss of precision in data fields.
Merge pull request #277 from mday299/mav_to_m_file_precision

mavtomfile: avoid loss of precision in data fields.
Propose new optical flow message
Build fix
Fix optical flow comment
autogenerated headers for rev https://github.com/mavlink/mavlink/tree/30f1f307917d3728502b88f105b98dff26f72e11
Fixed script
Fixed instructions
Fix docs