Google places+dalli fix

 - All of @angiedev's amazing Google Places work, [see here](https://github.com/railsforcharity/spokenvote/pull/273)

 - Prerender.io set up

 - Sitemap generation set up

 - robot.txt set up and configured

 - Added gem 'memcachier' and fixed Dalli errors

 - Puma Installed and configured

 - Final CSS Cleanup to enhance index Proposal listing