Simplify analytics page view reports

Instead of annotating each view, we can leverage UI Router's [state change
events](https://github.com/angular-ui/ui-router/wiki#state-change-events) to
track which views are viewed.
Fix click tracker attr name
Click tracker is always an attribute, so restrict
lmisAnalyticsDirective -> gaClick
Trim whitespace on ga-click
Fix tracker unit test
Merge pull request #435 from tlvince/refactor/pageview-on-statechange

Simplify analytics handling, refs item:283