Do not send an error message for RX pairing commands
Optimize and update data manager docs

Move repeated code to common function
Update missing and misleading comments
Fix data manager test compile errors
No functional changes
Merge pull request #630 from jean-m-cyr/beta

Optimize and update data manager docs
Updated MAVLink version, no functional changes
Merge branch 'master' into beta
startup: make sdlog2 working again on FMUv1
position_estimator_inav: lower RAM
Fix for hexa mixer
Revert "position_estimator_inav: lower RAM"

This reverts commit b457e714972649f5a39fa3f2f9463bdfe6971fcc.
Merge pull request #633 from PX4/fmuv1_ram_cleanup

Fmuv1 ram cleanup
Startup: Hex vs Hexa
Merge pull request #639 from PX4/fix_hex_startup

Startup: Hex vs Hexa
Startup: Raise min throttle
Merge pull request #640 from julianoes/mc_min_throttle

Startup: Raise min throttle
Mixer load: don't upload empty mixers from non-existing files
Merge pull request #641 from julianoes/fix_mixer_load

Mixer load: don't upload empty mixers from non-existing files
Merge branch 'beta' into follower