new satellite tiles from mapbox cdn
Merge branch 'master' of https://github.com/codeforamerica/trails-mobile
Fixes #146 - show/hides loading screen

- Shows loading screen on app launch and fades it out when app loads.
- Unwatches app loaded functions after data has loaded.
- Adds fadein CSS class.
- CSS whitespace cleanup through TrailingSpaces plugin.
Merge branch 'master' of https://github.com/codeforamerica/trails-mobile
merging after conflict resolution