Changed encoding of incremental sql files to "UTF8 ohne BOM" as some older mysql versions cant load them otherwise with errors like:

ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ALTER TABLE `web_domain` ADD `pm` ENUM( 'static', 'dynamic', 'ondemand' ) NOT' at line 1
Loading SQL patch file: /tmp/trunk/install/sql/incremental/upd_0032.sql

- Added group (we call groups "circles" so that users don't mix them up with user groups) feature to client messaging section so that messages can be sent to either all clients/resellers or to groups of clients/resellers. TODO: add circle access control so that 1) a reseller can create circles that contain only his clients, not all clients, and 2) a reseller can send messages only to his own circles instead of all circles.