update 5.0.0.x ver #

Remove local retrieval of activation bytes. Use audible api. Dramatic…

…ally reduces program's size

update version

Merge branch 'master' of https://github.com/rmcrackan/Libation

Search engine bug fix and unit tests

* bug fix: when user creates a tag which is also a reserved bool word…

… (eg: israted), searching for this tag breaks the search

* add unit tests for search engine

* search engine: refactoring and improved logging

* bug fix: after book is liberated, filter should immediately honor new "is liberated" status

Add IsLiberated option to search engine. Reindex search after downloa…

…d and decrypt

Better logging and error handling during login

bug fix around latest skip-bad-book feature