Switch encoder back to PROFILE_VP3.

Motivated by the fact that PROFILE_FULL (6 quant tables) was less than well-tested when it comes to quality. Plus I guess old Cortado releases will be around for a while.

Note to (mostly) myself: Find a set of 6 quant tables that actually does make use of the added flexibility. Just copying old table values doesn't sound like it'll revolutionize and transform the video coding industry.


Oh, this is my first xiph.org checkin, by the way. All seek for cover.

svn path=/trunk/theora/; revision=13228