Python2x to Python3x

Google is finally refusing to run ancient python2 stuff on Google App Engine. This PR takes us from python2x to python310.

• Adds some more dev docs.
• Got a little slower(~150ms) with the introduction of more usage of the lxml parser in places that were previously just regex-ing against static html. Not ideal, but simpler python.
• Most of the remaining changes are just updating the project to the latest Google project stuff.
• Tested all the routes, confirmed working cases and non-working cases.
• May have found a bug in the Android client in the address search logic not alerting Address not found, but can't be arsed to fix it right now.

v3.1.0

Add /crimes route to docs and rate limiting.

v2.0.0

This release breaks compatibility with v1.0.0.

Introduces to the API, the majority of data elements available on my.appleton.org.

v1.0.0

Merge branch 'analytics'