hstores are text, and in py3k they seem to be implcitly unicode.  so
    add unicode encoding for py2k for the non-native hstore, pullreq for
    native psycopg2 support coming....
Unicode support for psycopg2 native hstore implementation
- repair for py3k
- fix test
changelog
add the py2k symbol from the 0.9 branch to support the hstore change