Fix luisfarzati/angulartics#110: ngRoute and ui-router support

Trying to be routing-agnostic isn't working for us
(see luisfarzati/angulartics#86 and luisfarzati/angulartics#114).

This PR intends to re-introduce specific support for the two most popular
routing modules: ngRoute and ui-router.

Tests have been updated to cover ngRoute and ui-router. I've implicitly
documented the minimum supported versions of both modules, using bower.json.

TODO:

* Update the README to explicitly document minimum supported versions of the
  routing modules.
Merge branch 'chrismendis-feature/routing-specific'

* chrismendis-feature/routing-specific:
  Fix luisfarzati/angulartics#110: ngRoute and ui-router support
cut 0.15.18 release