ROMFS: ignore comments and newlines in startup files, text in mixer files
ROMFS: only identify *.mix as mixer files
sdlog2: getopt invalid usage fixed
add simple trim parameter for fw attitude
Merge remote-tracking branch 'upstream/master' into fw_trim
fw pitch sp and roll sp offset parameter
Merge remote-tracking branch 'upstream/master' into beta_fwtrim
fw sp offsets: convert deg to rad
Reduce excessive stack sizes on main OS stacks. This has been tested on mavlink_beta, but needs more careful testing.
sdlog2: use orb_check() instead of poll() to minimize polling overhead, bugs and compiler warnings fixed
sdlog2: code style fixed
Merge branch 'master' into sdlog2_opt
sdlog2: move some global variables to local scope, set default log rate to 50 Hz
sdlog2: lseek() workaround removed
sdlog2: bug fixed, sleep when idle too
sdlog2: max write chunk increased to 1024
Revert "sdlog2: max write chunk increased to 1024"

This reverts commit a478dac621301a993fb8ed13b86abd61d93bfec0.
dumpfile command and fetch_log.py tool implemented to fetch logs via nsh console on USB
launchdetection: better integration of Blocks class
Merge branch 'getopt_fixes' into sdlog2_opt