Blender Git Loki

Add the ability to query the last redoable operator from in python. Add the ability to mark certain operator properties as "Primary" meaning that they're the most important ones, and the ones that should be shown if the operator's representation must be shortened. Built an example/prototype floating control which shows the last operator and, if clicked, opens the f6 window for that operator. It has a few problems though, such as that it can't seem to access all operator properties and I can't figure out how to get it to render white.