Version 2.1.8-release, 28 apr 2014

fixed #1937, crash at SENTENCE operator
fixed #1933, quorum operator works incorrectly if it's number is exception
fixed #1932, fixed daemon index recovery after failed rotation
fixed #1923, crash at indexer with dict=keywords
fixed #1918, fixed crash while hitless words are used within fulltext operators which require hits
fixed #1878, daemon doesn't reset regexp_filter after rotation with seamless_rotate=0
fixed #1769, crash after unsuccessful INSERT at RT index
fixed #1682, field end modifier doesn't work with words containing blended chars