Fixes NPE.
Fixes initial load and skipping chat room system messages.
Fixes ConcurrentModificationException.
Fixes showing source contacts in contactlist on change event.
Fixes NPEs with contact queries.
Fixes the name of the registry key for the IM Provider in the windows
installer.
Intermediate commit to save clean up (not currently working right now)
Rewritten IrcAccRegWizz after the IcqAccRegWizz since the original
implementation causes problems during loading.
Minimal IRC stack set-up.
Working on chatroom interactions.
Working on channel join/part operations and management.
Working on basic chatroom operations: topic changes, mode changes,
join/part/quit events, messages.
Tweaks + basic infrastructure for mode changes.
Upstream fix for NPE in IRC-API.
Working on mode change support and listen to kick channel messages.
Added a TODO note for later attention.
Improved kick handling in chatroom listener.
Reduced code nesting.
Throw exception after failed attempt to connect to IRC server.
Invalid operation: disconnect is not availble at that moment.