Implement isEqual, NSCopying for TFCoordinate.
Vertices in polygon class.
Merge remote-tracking branch 'upstream/master'
Fix indexing mistake, add tests file.
Add tests to add vertex, remove vertex, close polygon.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Terraformer.xcodeproj/project.pbxproj
	Terraformer/TFCoordinate.m
	TerraformerTests/TerraformerTests.m
Fix code style.
Merge pull request #9 from mbcharbonneau/master

Add fundamentals of TFPolygon class.