Evas font/textblock/text: Started using string objects instead of

Evas font/textblock/text: Started using string objects instead of
strings in most of the font engine (everywhere except draw).
Haven't removed the paramteres yet, but did mark them as UNUSED.
Removing them will be part of a future change.
Removed run-time OT toggling support, OT is now fast, no need for that.
Renamed all of the intl_props->text_props (because it really changed purpose now)
Fixed spliting/merging of text_props to be fast and good, not hacky and
complex like before.
Note to reviewers: Most of the changes are indentation related, sorry
for the mess, but I had to do it all in one commit, splitting was not
trivial (at least not in retrospect). The important parts are
evas_font_default_walk.x and text_utils.c. query and draw were just
adjusted a bit and the rest were only adjusted to conform to renaming or
were renaming on their own.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@56629 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33