Blender Git Loki

Added select grouped property (objects with shared property names will be selected)
(updated select group toolbox and header menu)

Added 2 copy property options - Replace All and Merge All, since there was no way to remove all properties, or set all objects game properties to be the same as the active objects.
Added set_ob_property(ob, prop) to property api.

bugfix in python api, copyAllPropertiesTo, it didnt check for duplicates or that it wasnt copying from/to the same object.