Length Notifier Plugin has configuration dialog (added entry with JIDs to be included when plugin is working) - fully usable.
Default values of configuration key has been added to GajimPlugin.
Some other minor changes/fixes.
Example plug-ins were modified to use init() instead of __init__().
Added new category in configuration - 'plugins'. It only holds one option for each plugin - 'active', which determines whether plugin should be activated on startup.
Now, Gajim remembers which plugins are active on exit, and activates them on next startup.