removed backbone dependency
Set use ranges to true
fixed zip fetcher bug
Merge branch 'develop' into feature/fetchers_cleanup

Conflicts:
	epub-modules/epub-fetch/src/models/zip_fetcher.js
Cleanump zipFetcher ufter merge
In progress
looots of junk removal and code refactoring
configuration cleanup
Merge branch 'feature/fetchers_cleanup' into develop