Objective-C generator for Mavlink.
Small fixes to ObjectiveC generator post-rebase
More efficient object parsing by making ID to class mapping static
Merge pull request #145 from johnboiles/johnb_objc

Objective-C Mavlink generator (mavgen_objc.py)
Merge remote-tracking branch 'upstream/master' into externalsetpoints
pymavlink: support DF log in magfit_rotation_gyro.py
pymavlink: avoid shell to reduce buffering for child exec
Merge remote-tracking branch 'upstream/master' into externalsetpoints