Add Chrome Platform Analytics

Usage:

You need a google analytics account. In this account you need to create
projects and apps to track. For each app, you will have a unique tracking id,
which you need to pass to the tracker in tracking-service.js.

Event tracking takes place by injecting the ‘lmisAnalyticsDirective’ tag into
the corresponding element, which is called onClick.

Page tracking takes place by injecting ‘lmisPageViewReport’ in the
corresponding view.

Work in progress: event categories and descriptions need to be checked and
amend description if necessary.

Need to implement the exception tracker for all exceptions, by sending the
exceptions data from inside a catch block, as in uomfactory.js

Notes: I chose CPA analytics over angulartics as the latter uses the ga script
at the end of the body tag (or header) of the index.html, which violates SPA’s
security protocols. CPA does not cache http requests for up to four hours by
default as the ga (angulartics) does. I momentarily thought that http requests
can be cached at a fixed time-lapse, cause of some flags i saw on the POST
packet. However, i asked the authors and they told me that this can only be
done with a custom implementation similar to what  we discussed in flow dock on
Monday 9/06/14 with Justin and Jide.

Hope this helps!
Quick fix to pass tests, linting