Dependency updates and new package name

[tschaub]

We now have access to the openlayers package name in the npm registry. I'd like to start publishing pre-releases there. Over time, we'll work out exactly what gets published. For now, it's the whole repo.

[elemoine]

+1 (when Travis is happy again)

[tschaub]

I get the same timeout locally. Looks like a genuine issue with the upgrade to proj4@2.3.3.

Will investigate a bit.

[tschaub]

Actually, on master the same test takes 2.5s to run. Rather than bumping up the timeout, I'd like to determine out if the precision of our point resolution estimates is worth the computational intensity.

[tschaub]

I was mistaken in thinking that the proj.getPointResolution method used the ellipsoid functions (of which I was suspicious in terms of intensity / increased precision). So to reduce the chance of test timeouts, I've proposed that we cut the number of cases (see #2840).