handle events using the new GA API

[miltontony]

No description provided.

[trevoriancox]

Page tracking works with Universal Analytics but the event tracking code does not. In utils.py:

if event:
    params.update({
        't': 'event',
        'utme': '5(%s)' % '*'.join(event),
    })

But the params for Universal are:

ea Event Action
ec Event Category
el Event Label
ev Event Value

[trevoriancox]

The branch praekelt:feature/universal-analytics-support added universal analytics. I've merged with the 2.0.3 version in master and submitted a pull request.