primstar 0.9.14-git

Render - Bake Second Life Sculpties renamed to Render - Bake Sculpt Meshes and updated to the new tkinter GUI.

I've still some work to do on error reporting (such as no sculpt meshes selected), but otherwise everything should work.

There's one new option "Keep Seams" - for 99% of meshes this setting won't make any difference. If you have a mesh with multiple UV edges exactly on the seam pixels, then turning this off will use an average of those edges for the pixel rather than just using the seam edge. So the default setting with keep seams enabled is going to be correct pretty much always. I improved the baker between making a note to add this, and actually doing it and now I'm not sure it's even needed.