Added the UpdateDefaultTheme function.
Renamed panelRenderTemplate to renderTemplate.
Renamed panelSuccessRedirect to successRedirect.
Reduced the amount of boilerplate in panel.GroupsEdit with renderTemplate.
Renamed the pre_render_panel_edit_group hook to pre_render_panel_group_edit.
Reduced the amount of boilerplate in panel.GroupsEditPerms with renderTemplate.
Renamed the pre_render_panel_edit_group_perms hook to pre_render_panel_group_edit_perms.
Fixed a bug where the active status for themes didn't get loaded at start-up.
Fixed a theoretical deadlock in NewThemeList.
Updated CONTRIBUTING.md
RemoveHook now panics under conditions which should normally never happen, but which when it does, gives off a far more useful message.
Changed the order of the conditional after BypassActive in PluginsDeactivate, so the error message will show up now.
The deactivation handler is optional again for plugins.
Added more tests for the plugin system.
Added many, many tests for the plugin system.
Refactored some of the plugin system queries.
Fixed a bug where prepared statements would build up and crash Gosora.
Removed the inline CSS from the plugin rows.