prosthetic-hand unit tests

[IvanSanchez]

Proof of concept of unit tests for mouse events, part of what needs to be done for #3530.

This reverts the "Force PhantomJS to be non-touch" behaviour of #1434 - recent versions of PhantomJS do indeed implement TouchEvents more or less properly.

[mourner]

This looks great! I see that 3 of the 4 tests are skipped on PhantomJS — is there a way to run them there? I thought this was one of the points of prosthetic-hand.

[IvanSanchez]

@mourner They are not skipped in my setup - ensure you're using PhantomJS 2.1.1.

Also, note that 4 GridLayer/TileLayer tests are skipped due to PhantomJS not having CSS transitions support (needed for the FlyTo() tests).

[IvanSanchez]

@mourner Phantom should skip exactly 5 tests - I made a quick amend to my commit, so that you can now run grep skipInPhamtom -r spec/ and check that, indeed, PhantomJS purposefully skips 5 tests.

This is different than skipIfNotTouch, which is meant for running the tests on Firefox (or IE or Safari), because they do not implement Touch events

[mourner]

👍 awesome. Let's merge.