Improve the user experience of the addon.

Author Daniel Pittman <daniel@rimspace.net>
Author date 2018-08-08 01:18:29
Author local date 2018-08-07 21:18:29 -0400
Committer Daniel Pittman <daniel@rimspace.net>
Committer date 2018-08-08 01:19:24
Committer local date 2018-08-07 21:19:24 -0400
Commit 8f1c71308d9beeab9e23a9ef838504a94186ab2c
Tree 2a4fe2785c035ecba034ae0218ac43b4d04e40fe
Parent 1d4f11b6f79850c35cff58f2e756ced31495a6b8
Improve the user experience of the addon.

* Ensure that alerts are displayed every time a book is already read.
* Use a much less significant dramatic, and better timed, sound for read books.
* Allow overriding the addon by double-tap interact for a book.