Split off journal to new GlJournal object
Add simple journal query method
Add method to free result lists
Use new journal query API for "all" category
Handle matches in gl_journal_query()
Use new journal query API for "important" category
Use new query API for "applications" category
Use new journal query API for "system" category
Use new journal query API for "hardware" catwgory
Use new journal query API for "security" category
Add method to query a single event with a cursor
Use new cursor query method in listbox filter
Use new cursor query method in details view
Remove unused gl_journal_get_journal() method
Add details view to all categories

https://bugzilla.gnome.org/show_bug.cgi?id=709300
Refactor category, view and toolbar state changes
Adjust important category to priorities <= 3
Make "important" category the default

https://bugzilla.gnome.org/show_bug.cgi?id=709303
Unref GFile and GtkCssProvider in gl_window_init()