some refactoring to put all the CMB stuff into one file. Remove cmb-init which mostly has sample stuff besides the actual initialization which I put into cmb.php
include cmb.php instead of cmb-init.php
move all the cmb stuff to cmb.php
move the filter to cmb.php
move the cpt and taxonomy stuff into separate files
move all the taxonomy and cpt stuff into the new files
include the new cpt and taxonomy files
change private to public so I can use this outside of this class
more options checks
need to add an instance
initialize the class with get_instance()
change how the Book_Reviews class is called
all this stuff is going to be handled in the classes of their respective features
adds the new author-image setting
add a check for author image
add the author image meta box if author images are enabled #13

TODO: render the image on the front-end
Merge branch 'feature/author_image' into develop