Clockface needs a destroy method.

[johntrepreneur]

This can be managed by the code consuming clockface using jquery .remove on all '.clockface.dropdown-menu' elements, but would be a little cleaner if there was a destroy method like other widgets.

We currently use clockface on a bootstrap dialog and when the dialog is closed the clockface node is sitting off the body. Then when we open a new dialog, clockface adds another '.clockface.dropdown-menu' node off of body.