Added dual bookshelf feature with text file Bookshelf.txt.  If Bookshelf.txt == A then it uses Bookshelf A.  The default otherwise is to use Bookshelf B.  This will be altered in the future to allow different bookshelves and perhaps more strict rules on what Bookshelf.txt can read and how it can be altered.
Added dual bookshelf feature with text file Bookshelf.txt.  If Bookshelf.txt == A then it uses Bookshelf A.  The default otherwise is to use Bookshelf B.  This will be altered in the future to allow different bookshelves and perhaps more strict rules on what Bookshelf.txt can read and how it can be altered.

dupriest/EyeReader