issue #892
polyline specs
- prove that polyline is created with points
removed the real google maps from all specs as it interferes too much
with mocks

Mocking out
- full mock implementation and better support for Polyline, MVCArray,
  LatLng, and more

build all for PR
Merge pull request #939 from nmccready/feature/polyline_specs

polyline specs
improve readability
use onlyTheLast instead of updateInProgress

only slightly less performant but ensures the map
always is left in the state that it was last called in.

updateInProgress often results in the map skipping a collection
change