[airborne] only cosmetic cleanup: convert leading tabs to spaces
[ins] fix ins_reset_local_origin ifndef GPS_USE_LATLONG

divide utm in int/cm by float (100.0f instead of 100)

while at it, explicitly use floats in some more conversions (technically 100. is a double)
[conf] flash_modes: fix board regexes
[stm32][i2c] enable correct error interrupts
[peripherals] fix dox for l3gd20
start bringing changelog up-to-date
Merge remote-tracking branch 'upstream/master' into working
Merge branch 'working' into compass_hotfix
Merge branch 'compass_hotfix' of https://github.com/achambers16/paparazzi into compass_hotfix