FLOE-221: Restructuring repo
- restructured repo to allow for multiple books.
- books go sibling to one another at the root level.
- the contents of each book (html, images, videos etc.) go into sub directories of each book.
FLOE-221: Updated README
- changed command line to output EPUB to book's root
- added notes about directory structure
- removed remarks about the videos
FLOE-221: Edited Readme file.