[stabilization] Float euler bounding and scaling fix
- added BoundAbs to properly bound the commands
- removed gain denominators in the control loop (i.e. now the gains should be more consistent with other stabilization systems)

First, it is easier to set your gains now, as the values set by GCS/airframe config are the ones actually used (no division).
Second, the gains are in the same range as for other stabilization systems (no need to change xml settings files for GCS to get proper range).
[stabilization] fixed MAX_SUM_ERR
Merge pull request #588 from podhrmic/master

[stabilization] Float euler bounding and scaling fix

you need to divide the old dd-gain by 512 and the old i-gain by 1024.