dhtml_menu 7.x-1.0-beta1

This milestone fixes only a short list of open bugs since the 7.x-1.0-alpha4 release, but it is nevertheless stable enough, in my opinion, to justify marking this as the first beta.

Bugs and API compatibility:
- #883932: Added a $form parameter that somehow went missing from the function signature of dhtml_menu_settings().
- #801826: Moved the settings page from admin/settings/dhtml_menu to admin/config/user-interface/dhtml_menu.
- #665290: Added t() calls to several untranslatable user-facing strings.

Translations
- 665282: New, updated Spanish translation provided by arhak.

There are several remaining open tasks and feature requests for D7, but it is necessary to get this release out now, particularly since the last milestone is practically unusable due to the first bug.