2.1 docs uberupdate

git-svn-id: http://sphinxsearch.googlecode.com/svn/trunk@3693 8b96e2b9-35c5-2c16-bc47-5122d61876d4
and i dub thee 2.2.1-dev

git-svn-id: http://sphinxsearch.googlecode.com/svn/trunk@3695 8b96e2b9-35c5-2c16-bc47-5122d61876d4