autosavetime
============

Description
-----------
Optionally set the notebook autosave interval, and/or add a selector to the toolbar to set it.

Parameters
----------

* autosavetime_set_starting_interval
  Set an autosave interval on notebook load. If false, the default is unchanged.
* autosavetime_starting_interval
  Autosave interval (in minutes) which would be set on notebook load.
* autosavetime_show_selector
  Add a selector to the toolbar to change the autosave interval
