Rename a few utility functions
Merge function rename from epubbase
Rewrite quotify to eliminate ugly special-casing

Add an optional exclude argument to filter out note links or
similar when quotifying.
Merge quotify rewrite from epubbase

Conflicts:
	sanitize.py
Exclude note links from quotify
Add a missing space after note link

The EPUB has no unexpected changes compared to commit
51acbc35d0a48a8c3495053d2069bcafa341cc99.