Replace some 'sqrt(a*a, b*b)' by 'hypot(a, b)'.

Patch by ldo (Lawrence D'Oliveiro), with very minor changes by myself.
Merge remote-tracking branch 'hm-blender/master'

* hm-blender/master:
  Replace some 'sqrt(a*a, b*b)' by 'hypot(a, b)'.
Fix T40516: Binary FBX export missing deform bones only option.
FBX Export: rename version so it fits in the UI

also rename 'Bake Space Transform' -> 'Apply Transform'
Merge remote-tracking branch 'hm-blender/master'

* hm-blender/master:
  FBX Export: rename version so it fits in the UI
  Fix T40516: Binary FBX export missing deform bones only option.