Format the newer codebase according to PSR-2.

Ran the vendors directory through CS checker. Main
changes are bracket placements and converting tabs to
spaces. Contains few signature changes:

* Tag handlers use camel casing, 'render' prefix.
* set_language and set_owner in Textpack_Parser.

See issue #408

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5757 2fea6a4d-a838-0410-917b-93a53c48e9d2