wip operator py-api

"operator.ED_VIEW3D_OT_viewhome(center=1)" calls the operator, converting keyword args to properties.
Need a way to run scripts in the UI for useful testing.

Still need to deal with operator exceptions and verifying args against operator options. 

Added temporary WM_operatortype_first() to allow python to return a list if available operators, can replace this with something better later (operator iterator?)

source/blender/windowmanager/WM_api.h

@@ -114,6 +114,7 @@ void		WM_error(struct bContext *C, char *str);
 
 			/* operator api */
 wmOperatorType *WM_operatortype_find(const char *idname);
+wmOperatorType *WM_operatortype_first(void);
 void		WM_operatortype_append	(void (*opfunc)(wmOperatorType*));
 
 int         WM_operator_call		(struct bContext *C, const char *opstring, int context, struct IDProperty *properties);