vmount: add mount and ROI implementation

MavLink spec implementation

implemented vehicle_roi topic

rename old gimbal to rc_gimbal

little changes

corrected RC Gimbal group

Starting ROI implementation in commander

implementation done, needs to be tested

uhm..

add todo

Change to float32 for x,y and z

remove mission topic again, not needed

change roi coordinates to lat, lon and alt

adjust to float64

starting mount implementation

correcting small mistakes, compiles now

add todos

further progress

implementing parameters

adjust default parameters

started implementation of mavlink

fix typo

change to lat, lon and alt

fix typo :D

change to double (to represent float64)

add global_position_

add mount topic

commander mount implementation done

cleanup

almost finished

little fix

codestyle fixes

leave pitch at 0 degrees

added pitch calculation

codestyle changes

Undo vehicle_mount, react to updated parameters, parsing of CMD_DO_MOUNT_* in mount.cpp

start implementing mode override

forgot a semikolon.

add debug

Finish implementation of mount override and manual control.

fix codestyle

correct cleanup

rename to vmount

works now

fix rebase error

fix polling

refactoring and custom airframe for gimbal

couple changes

remove warnx

almost done

finally

What is going on?

change back to actuator_controls_2

working

bump parameter version number and some clarification

fix submodules