Add Incref and Decref functions
Add Incref and Decref functions

Since methods can't be used when an interface value is nil, add Incref
and Decref functions that act like the Py_XINCREF, Py_XDECREF macros -
i.e. will call obj.Incref()/Decref() unless obj == nil.

limetext/gopy,qur/gopy,qur/gopy,ericsnowcurrently/qur-gopy,limetext/gopy,limetext/gopy,ericsnowcurrently/qur-gopy,ericsnowcurrently/qur-gopy,qur/gopy