fix null latlng before setting address
Replaced WatchPosition with GetPosition to
  eliminate battery draining position polling
Added content to the about page
Change 'Set Address" menu item to "Find me ..."
More descriptive case list title
moved find neighborhood button underneath map for small screens.
ressurect >> on About page
Merge pull request #61 from jdungan/master

General Cleanup
Get heroku manual build working

- Remove "Deploy to Heroku" button, since no free option
- Uses https://github.com/cyberdelia/heroku-geo-buildpack.git
- If Heroku detected, database driver switched to postgis
- Retain staticfiles folder for working ./manage.py collectstatic
- app.json has the minimal config for DEBUG=False config, loads data
- Closes #50
Remove commented-out images