Tool for changing local user passwords

I don't think there's any way to do this.  Here's an easy hotfix for supporting that.

I simply copied the code from django's changepassword command, and changed User to FacilityUser.  The interfaces are similar enough that this worked just fine.

See this URL for info about Django's command.
https://docs.djangoproject.com/en/1.4/topics/auth/

@jamalex , could we merge this in as a hotfix on master, to support the dev request?