when both are off the behavior is unchanged.
This is needed when rendering alpha text so its possible to have a single layer of faces but use the bevel option to make text thicker.
adding a rim on the back when back is disabled also doesnt make much sense IMHO.
minor python edits too.
- made smallcaps use a temp flag so caps can still have the smallcaps flag.
- utility function for getting the char from a font. find_vfont_char(), was inline in ~5 places.
- removed CU_STYLE mix of flags only used in one place, not needed. removed 'style' from rna too.
- fix for some warnings.
