* For new buttons spaces, automatically set horizontal/vertical
align depending on size, instead of free.
* Cleaned up the UI panel API. There's now a new uiBeginPanel
function which takes a panel type, and a uiEndPanel which takes
the final size. uiNewPanel* functions will be phased out.
* Animate the re-alignment when a panel size changes, e.g. when
enabling dupliframes.
* Load ui scripts from the release/ folder first if it is
available. This makes it easier to edit ui scripts, since it
will directly use the original files which avoids having to
run the build system.
* Improve editing of panel types while blender is open. That
means fixing some issues with lacking updates, overlaps, strange
ordering. It even does an animation now when the panel resizes.
The bug was todo with bpy.data and bpy.types becoming invalid, temporary fix is to re-assign them to the bpy module before running python operators or panels.
will look into a nicer way to get this working.
* Fix to make python panels callbacks get the actual
blender Panel as an argument, instead of any instance.
* Fix for callback validation in python 2.5, worked OK
in python 3.0 but gave error in 2.5 because it's a
method instead of a function there.
