issue 920; remove python reverse geocoding

###addresses issue 920

* Removed all reverse geocoding from python code.
* Removed old tests that tested reverse geocoding functionality.
* Added a new test to confirm basic behavior of the set location page.
* Updated existing set location page test.
* __Removed package pygeoip as this dependency is no longer used.__

All tests passed locally.

This and pull request [233] (https://github.com/openhatch/oh-mainline/pull/233) should close out [issue 920](https://openhatch.org/bugs/issue920)