Update README.md

Corrected grammer.
Merge pull request #13 from GeoffCapper/master

Fixes and MVCArray update, ArcBuilder utility class.
Merge pull request #17 from GeoffCapper/master

Implement ElevationService and MaxZoomServices.
Updated POM file info w/ additional meta data and plugin for signing artifacts.
Merge origin/master
Updated comment to change & to "and" so javadoc didn't choke.
Merge pull request #2 from rterp/master

Up to date