Add password reset compatibility

As discussed in #13. Replacing the ReminderRepository turned out to be more complicated than I thought, for some reason Laravel insisted on sticking with the default one, and I don't know how to replace it. I did finish the code though, so if you're interested just let me know.

Anyway, this way is a bit more consistent with the Laravel documentation (a separate form for resetting the password rather than generating one) while achieving the same goal.

For this to work correctly, one line has to be changed in the generated RemindersController as well. The password reset function just needs this:
``` php
DB::table('users')->where('id', $user->id)->update(['password' => sha1($password)]);
```