fixed #1552 string filter vs distributed index
fixed client protocol version ver 1.30 (0x11E)
added #1553 string filter to APIs php, python, libsphinx
fixed #1554 string filter at SphinxQL query log
added regressions to test 206

git-svn-id: http://sphinxsearch.googlecode.com/svn/trunk@3883 8b96e2b9-35c5-2c16-bc47-5122d61876d4