Merge remote-tracking branch 'origin/master' into JC1263
JC-1552, JC-1555  Now registration plugin uses own validation messages and accepts UserDto with specified language. Transaction isolation level changed to READ_COMMITTED.
#JC-1470 Fixed auto completion for Firefox
Merge https://github.com/jtalks-org/jcommune into JC1263
Merge branch 'JC1263' of https://github.com/jtalks-org/jcommune into JC1263