* test_isupports_primitives moves to unittest and tests unicode.
* More overloads for PyObject_FromNSString, dropping PyUnicode_FromPRUnichar.
* PyExc_MemoryError translated to NS_ERROR_OUT_OF_MEMORY
* PyXPCOM_FormatCurrentException becomes public.
* Add more type slots, even though we don't use them yet.
git-svn-id: svn://10.0.0.236/branches/DOM_AGNOSTIC_BRANCH@181432 18797224-902f-48f8-a5cc-f745e15eee43
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