the same properties were being registered many times with built in structs.
blender memory at least is not leaking, but it seems python is still not freeing some memory.
For the moment dont allow existing properties to be registered again, will need to have a way to unregister rna properties.
python modules bpy.app, bpy.utils are now included in docs.
C defined python module bpy.props has its docstrings extracted and written directly into sphinx docs since the C methods cant be inspected.
added docstrings to bpy.props and improved some in bpy.utils.
will update online docs tomorrow.
written from scratch by Daniel Salazar (zanqdo). added own modifications.
New property type
bpy.props.FloatVectorProperty(), only difference with float is it takes a 'size' argument and optional 'default' sequence of floats.
moved bpy.props.* functions out of bpy_rna.c into their own C file.
