Add param struct
Augment and consolidate common.xml for robotic applications
Merged master
Make enum consistent
Updated global pose with covariance message based on discussion
Add estimator type enum draft - needs work
Merged master
Set correct type for param union
pymavlink: added offset support to mag_field_df()
pymavlink: added DF log support to magfit.py
pymavlink: raise version
Fix XML typos, remove param message so this PR can go in
Merge pull request #217 from mavlink/rev4_update

Rev4 update
Support for Travis-ci (Continuous Integration Server)
Added travis-ci  build status to README
ardupilotmega: added BATTERY2 message

for 2nd batter monitoring
common.xml: fixed syntax for ATTITUDE_QUATERNION_COV
generator: check for invalid arrays in field names
Fix a number of fields based on a discussion with Andrew Tridgell. Not using float in them would make handling of existing commands essentially undefined
Fix break line breakage