Fixed grid coordinate generation bug
Refactored and debugged RandomWalk.  Called RandomWalk from MapViewController with hardcoded bounds
Merge pull request #31 from kirby/master

Add images for annotation callout; add Uber call
Added map types
Added change Map feature
merged randomWalk fixes and changes. Refactored some merge code
Merge branch 'Hybrids' of https://github.com/Victor-Adu/DrunkardsWalk into Victor-Adu-Hybrids
Merge branch 'Victor-Adu-Hybrids'
add Uber dropoff location and nickname
merge with upstream