Line crossing antimeridian example

[captainbarbosa]

I think adding an example where we have an MGLPolyline crossing the antimeridian would be useful.

[jmkiley]

Capturing that in order to do this, users need to use one set of coordinates that has a longitude either greater than 180 or less than -180.

[captainbarbosa]

Yup, we should still do this.