Added support for adding items to marking menus, and documented the optional keyword arguments.
Added support for adding items to marking menus, and documented the optional keyword arguments.


davidsminor/cortex,goddardl/cortex,danieldresser/cortex,hradec/cortex,lento/cortex,lento/cortex,danieldresser/cortex,hradec/cortex,goddardl/cortex,davidsminor/cortex,davidsminor/cortex,danieldresser/cortex,hradec/cortex,goddardl/cortex,danieldresser/cortex,appleseedhq/cortex,appleseedhq/cortex,davidsminor/cortex,lento/cortex,appleseedhq/cortex