Add implementation of [TFGeometry bbox]
Merge pull request #4 from aranasaurus/master

Add implementation of [TFGeometry bbox]
LineString first pass
LineString basics, LineString tests, Coordinate tests
Merge branch 'master' of github.com:poeks/terraformer-objc

Conflicts:
	Terraformer.xcodeproj/project.pbxproj
	Terraformer/TFLineString.h
	Terraformer/TFLineString.m