added parent to labels
added class.emailclient.php
removed need for accounts_asooc table (e.g. table can now be dropped from the setup)
removed accounts_assoc database table
added pretty messages when running crons from browser window
added cache support to exchange rates parsers
added forecast support for pending transactions
partial support for contacts (still in alpha)
fixed bug with comments not being added from pending transactions
added cache file and cache generation for exchange rate parsers (by default, the cache file is valid for one day)