Initial commit - added north class with single test
Merge branch 'master' of https://github.com/mikeljames/MartianRobots
Added turn left function to North direction class. Returns West object type.
Relight - north not implemented tunRight method.
greenLight - East class added. corrected test typo.
West tests added testing returns West string
Refactored to inject Directions into constructor. To ensure we don't have Circular dependencies
RedLight - Adding final location tests for East
Green light - tests passing.