Allows for all animations contained in a .blend file to be correctly imported by Unity,
instead of just the most recent one being imported under the generic name 'Scene'.
Replaces all occurences of bake_anim_use_all_actions=False in
<CurrentUnityEditorVersion>/Editor/Data/Tools/Unity-BlenderToFBX.py
with bake_anim_use_all_actions=True.
based on a more manual script version proposed by fuser on the Unity forums.