applied to python api and exotic.c, removed some args being passed down which were not needed.
keyword args for new mathutils types were being ignored when they should raise an error.
- bpy.app.debug can now be set, removed bpy.data.debug (since this is not blendfile data)
- added bpy.app.tempdir, this is needed because the userpref temp dir isn't always set, $TEMP may be used instead and scripts need temp dir access.
* fix for autosave location -> shouldn't use BLI_gethome anymore
* this frees BLI_gethome of having to emulate the local->user->system search path and can now be truly considered as 'home/default location for .blend files'
* removed setting the default G.sce from read_history, was out of context there.
* fix for creating user dir, leftover from previous commit.
jesterKing, please review -> if there are any issues I will fix or revert.
