Update name attribute for filter inputs. Fixes #423.

I also removed the service_area filter and reverted back to Poltergeist to be able to see JS errors. I ran into the Modernizr error a few times. Hopefully it will be fixed soon.
Fix Rails 4 asset pipeline issues. Fixes #429.

Made changes per this article:
https://devcenter.heroku.com/articles/rails-4-asset-pipeline

One main cause for the Heroku issues was that the config.serve_static_assets setting in production.rb was set to false during the Rails 4 upgrade.
Merge pull request #430 from codeforamerica/423-fix-search-input-fields

Update name attribute for filter inputs. Fixes #423.
Merge pull request #431 from codeforamerica/fix-asset-pipeline

Fix Rails 4 asset pipeline issues. Fixes #429.
Fixes #409 - refactors polyfills

Modernizr and polyfills were placed inside the requires module
management. However, this led to issues as (a) the polyfills are only
needed in older IE and (b) Modernizr has its own module system that had
issues with the Modernizr-Selectors plugin being loaded before
Modernizr in some instances.