Added metadata about variable_realm_weight_ variable. Do not show empty groups in variable admin page.

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Added some more options and hook_variable_realm_params_alter().

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Added hook_variable_realm_info_alter()

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Added 'keys callback' and 'list callback' support in variable_realm_info(). Resolve variable conflicts in settings forms using weights.

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Order realms by weight in variable_realm_list()

Issue #1567232: API improvements for Variable Realm: removed drupal_strtolower call on t() parameter.

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Added hook_variable_realm_variable_list_alter()

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Auto generated settings forms for variable realms.

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Improved per realm/key settings forms.

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Introducing hook_variable_settings_form_alter()

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Moving hook_variable_realm_switch() to realm module.

Issue #1567232 by Jose Reyero: API improvements for Variable Realm. Passing realm as options, more flexible functions.

Issue #1219724 by Jose Reyero: Better handling of array and multiple variables. Moved format function to main module so it is always available.