Added accidentally removed title of the book to the parser
Merge branch 'master' of github.com:kiwix/gutenberg
Corrected pattern based on the file paths of gutenberg mirror instead of the official gutenberg site
Added an UrlBuilder that will generate the url of the book files
Missed a pattern that was in a wrong format
Added better file type filtering. Now everything unnecessary will be stripped out.
Merge branch 'master' of github.com:kiwix/gutenberg

Conflicts:
	gutenberg/database.py
	gutenberg/rdf.py
	gutenberg/utils.py