manual control messages should be processed outside HIL
cleanup handling of manual control input loss
make offboard and manual checks more consistent
make last receive timestamps for offboard and manual consistent
add parameter to enable mavlink manual control msgs
run fix_code_style.sh to make code formatting consistent with the project style

This cleans up the code style of my recent mods as well as some other
previous contributions
merging with latest PX4/master
Merge branch 'master' of https://github.com/tstellanova/multivantage