Complete rewrite of the Alchemy.ListFilter js class
Refactors the GUI initializing process.

Introduced one global GUI initializer that takes a scope for initializing only specific areas, i.e. overlays.
Adds global hotkey for closing a dialog (alt-w). Refs #374
Enhancements for database.yml creation in capistrano task.
Do NOT throw 404 if content can't be found while changing pictures.
Make Alchemy.ImageLoader consistent to other GUI initializers.

You now just pass a scope to the ImageLoader.
Only initialize dialog body GUI of current dialog instance.

Fixes double initialize errors of certain GUI elements, like overlay observers, etc.
Bump version to 2.6.0.rc5