change post new chapter form to django modelform
move ckeditor app to the last position in app list to override its js
change inline create author and book type form to django modelform
change copy book view along with the changing of autho and booktype form
change publish new book form to use django model form
apply the changing from publish new book form to copy book form

local test passed
make cover not required for publish new book form

also for book copy form
Merge pull request #9 from squallcs12/change-book-forms-to-model-form

Change book forms to model form