json attrs in RT indexes (no UPDATE yet)

git-svn-id: http://sphinxsearch.googlecode.com/svn/trunk@3662 8b96e2b9-35c5-2c16-bc47-5122d61876d4
fixed tests

git-svn-id: http://sphinxsearch.googlecode.com/svn/trunk@3663 8b96e2b9-35c5-2c16-bc47-5122d61876d4