Global constants and objects

Horde applications work with a standard set of constants:

HORDE_BASE	The filesystem location of Horde
APP_BASE	The filesystem location of the application's base
APP_TEMPLATES	The filesystem location of the application's template files

Applications work with a number of standard global variables and object:

$browser	Information on the client browser (Horde_Browser object)
$conf	The configuration hash
$injector	The injector instance; used to inject dependencies into various framework libraries (Horde_Injector object)
$language	The user's preferred language
$notification	The notification handler (Horde_Notification object)
$prefs	The user preferences (Horde_Prefs object)
$registry	The Horde Registry (Horde_Registry object)