Use proper view resolutions

Things to note:

* The resolutions used are those provided by @cedricmoullet in #36.
* The resolutions are stored on the $scope for use by the map directive. (I'd like to add ol.View2D#zoomTo for that.)
* There's a bug in ol3 that triggers if you use zoom=11 and higher in the permalink. I'll fix it in ol3.

Please review.