added json format to books controller
array being sent as JSON
callback function returns array of sentences for book object
test works
changed current sentence from class to id, now works
removed test div from book show and removed all non current sentence elements
book now initialized with position in sentence array
slider progress now dynamically updates with sentence
removed console logs and cleaned up code
Merge pull request #54 from bsusensjackson/rethinking_dom_pt_2

Rethinking dom pt 2