Strava style refinements

@strava/web-core-pod 

This is the first set of coffeescript style refinements to fit our existing style

* Use Sprockets require directives for dependency management
* Always use parentheses for function calls
* Prefer JS-style conditional operators to coffeescript English (e.g. `&&` over `and`)

The conditional operator change is based on the opinion of @QWin15 (and my similar opinion).

Dissent welcomed :)

Side note: because this is a fork, make sure you create PR requests against *our* master branch, not the upstream master.