Force font autohinting.

This was the behavior of of Ren'Py until switching to Freetype 2.4. The
autohinter more resembles the older Ren'Pys, seems to produce better
forms on most fonts, and fixes spacing issues on broken fonts.
Fix translation problem.

Returned the wrong value when we used RENPY_UPDATE_STRINGS
to translate a string with a {#translation_comment} in it.