Changed the flaskapp so that it retrieves reading lists from the user
instance.  The difference here is that User.readings is responsible for
sorting the list chronologically.

Lots of documentation changes.

Minimized the CSS some.  I haven't removed all white space yet, just
collapsed properties where applicable.
Cleaned up tags
More work on hgtags ... I seemed to have mangled the hg-git integration
against github.
Removed tag default/master
Removed tag github/master
Removed tag default/github
Removed all tags.