Improve Library List

1. Add Alphabetic Index
2. Better managment items list using a Cursor instead of ORMlite
3. Add a Manga Item List Cursor Adapter instead of Manga Item List Adapter
It improves layouts of Manga Detail and Manga Detail shows the manga categories
Refactor services, models and database

+ Improved update of manga list in database.
+ New approach for to generate IDs in the database using a hash function