* added ED_SCRIPT_OT_run_pyfile that takes a filename argument.
* RNA_property_string_set didn't add a value to ID props if the prop wasnt there (like ints, floats and bools do)
* bpy_operator.c - raise an error when unknown keyword args are passed to any operator .
Examples of bpy operator api...
bpyoperator.ED_VIEW3D_OT_viewhome(center=1)
bpyoperator.ED_SCR_OT_frame_offset(delta=10)
bpyoperator.ED_VIEW3D_OT_make_parent(type='OBJECT')
At the moment there is no way to stop the operators .invoke() function from running so ED_VIEW3D_OT_make_parent still opens the menu even though it doesn't need to.
this means it can reuse the function for converting python to RNA types - giving more useful errors.
* Incorrect enum args lists valid values in their exception message (used for PyRNA and PyOperators).
* remove bpy_idprop.c and bpy_idprop.h
PyOperators are not usable since they run outside the UI loop atm.
Fix: popup menus were not freeing operators.
Made a new Popup menu call for this case:
uiPupmenuOperator(C, maxrow, op, propname, menustr);
It will set enum "propname" to the menu item and call operator,
register it optionally and free it. Use it in "invoke" calls.
Next: automatic menu generating for enum properties!
"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?)
