Diffengine

A bugfix release to elevate the peewee dependency to > v3. This is required due to some deprecated and now removed ways of relating tables together.

This is a bugfix release to quit Firefox on exiting. Otherwise the selenium webdriver doesn't cleanly stop Firefox and you end up with lots of firefoxes cluttering up your process table (and using more and more resources).

This update swaps out PhantomJS for Firefox as a headless browser to screencap diffs. You will need to make sure that [geckodriver](https://github.com/mozilla/geckodriver) is installed in order to upgrade.

apt-get install firefox-geckodriver

It should be installable on Windows and OS X.

Small update to ignore soft-hyphens which was causing false positives like this:


As you can see _mastermind_ and _warehouse_ are visually identical. But inspection of the archived versions shows that there are soft-hyphens in the previous version which are not displaying...

Better logic around normalizing summary text.

This is a minor release that logs exceptions from Internet Archive's save this now API call.