Makefile: use $(CFLAGS)
Refactor UI code and improve delete

Forgot to commit before refactoring :(
Add Updates Page
Open files locally, if possible
Add update button
Allow user to acknowledge updates
Make an attempt at allowing multiple windows

Not everything is synchronized, but it works pretty well for the most
part.
Add search page
Add mnemonics
use SearchEntry
enable watching searches
wrong uri again...
Don't allow tags of unstarred items to be edited
refactor saving/loading code
Fail gracefully when unable to get information about preprint
Don'e allow tags with spaces in them
Gee.Collection.to_array() is evil
Rewrite searches if they don't contain a colon

This should do what people want most of the time.