* Added very basic loading of .py files on startup to define panels. It now executes all .py files in .blender/ui on startup. Right now this contains the object buttons, the C code for it is commented out. These files should get embedded in the blender executable as well eventually, that's a bit more complicated so this works for now. * For scons and cmake it seems to copy & find the files OK, for make only "make release" works (same with scripts/ folder it seems). * Added BLI_gethome_folder function in BLI_util.h. This is adapted from bpy_gethome, and gives the path to a folder in .blender like scripts or ui. There's plenty of things to figure out here about paths, embedding, caching, user configs ...