Change all URLs to Sass asset-pipeline URLs

* Add .scss extension
Fallback to assets pipeline if a precompiled asset is missed
Set width of map element to 100%

* This prevents map getting squeezed out of view on mobile
Merge branch 'master' into wo-compiled-assets
Precompile assets locally
Merge pull request #34 from wh1tney/wo-compiled-assets

Precompile assets for deployment