* primary goal: reduce global vars, slim down main file
(only do initialization of global stuff here, move everything else to a daemon class)
* properly close all open pop3/imap connections on shutdown
* throw/catch meaningful exceptions
* renamed IdleRunner/Idler run() methods to start() since 'run' suggests a blocking call (as in dialog.run())
removed sender_format from config
store both, sender name and address in mail objects
mailcollector: removed error messages from subject and sender strings
user script plugin: fixed script arg
