feat(event-tracking): start adding some client-side GA event-tracking
feat(event-tracking): add server-side GA tracking for ecommerce events
Merge branch 'event-tracking' into develop
refactor(bs3): put paypal button back in, use javascript API to
construct button on `ng-init` (since you can't nest script tags)
fix(bs3): fix to MemberModalCtrl parameter
feat(event-tracking): track ecommerce events