Blender Git Loki

Pie Menu fixes - features

* Allow setting arbitrary layouts in radial regions. This can be
used to make nice arrangements of subareas in the pie menu. Only buttons
directly in a pie layout will use pie menu style collision detection,
any buttons in nested layouts will use regular collision detection.
Appended a test menu in Q key, sculpt mode.

* Allow aligning of buttons now to permit any aligned nested layouts to
properly align their buttons

* Operator enums will now spawn to a pie menu if the layout is a root
layout of radial type.