Optimized MangaFox/Mangahere to not seach if the initial guess is correct. Also some manga on Mangahere has the next chapter link when it is not available. I added code to validate whether the last chapter found is available before adding to the download chapter list
Fixing the search on MangaFox
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/parsers/mangahere.py
Bugfix: Set outputBook.device instead of outputBook.DefaultDevice