Revert "Removed some char stars from ofxLetterTextObject. Also changed ofxSosoMappedChar constructor to use a string for the named entity, which clears up a ton of char star warnings. Misc other warnings fixed in ofxSosoMappedChar."

This reverts commit bb107f4cc8a8a37d4f878e2a256deb4fefc27a0c.
fix constructor of ofxLetterTextObject to match ofxTextObject