Fix potatolytics by ensuring the GA setup is always done first (bug 1061697)

This is a backport of https://github.com/mozilla/yogafire/commit/fbf8fa19de0e065b12d31f1741246ab592a0c061
Commit from Mozilla Verbatim by user kelemeng.: 335 of 335 strings translated (0 fuzzy).
Merge branch 'master' of github.com:mozilla/fireplace
Commit from Mozilla Verbatim by user kelemeng.: 335 of 335 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user civas.: 335 of 335 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user inma610.: 335 of 335 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user jasnapaka@jasnapaka.com.: 335 of 335 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user amanpreet.alam@gmail.com.: 335 of 335 strings translated (0 fuzzy).
Delete mkt-fxa.css
Commit from Mozilla Verbatim by user gialloporpora.: 335 of 335 strings translated (0 fuzzy).
Merge branch 'master' of github.com:mozilla/fireplace
Commit from Mozilla Verbatim by user gialloporpora.: 335 of 335 strings translated (0 fuzzy).
Only register one FxA message handler (bug 1080347)

Fixes #732
Commit from Mozilla Verbatim by user az.: 335 of 335 strings translated (0 fuzzy).
Merge branch 'master' of github.com:mozilla/fireplace
Commit from Mozilla Verbatim by user kohei.yoshino@gmail.com.: 335 of 335 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user benoit.leseul@gmail.com.: 335 of 335 strings translated (0 fuzzy).
desktop and mobile detail prose font-size fix
Fix oversized sign in spinner in Chrome (bug 1082302)
upgrade to bower/gulp system (bug 1072695)