add MapKit framework
need this to enable user to search by address
will return MKMapItem objects, which include latitude and longitude
should be able to use those properties to convert into CLLocation objects and use with Google Maps

https://developer.apple.com/library/ios/documentation/userexperience/Conceptual/LocationAwarenessPG/UsingGeocoders/UsingGeocoders.html

https://developer.apple.com/library/ios/documentation/MapKit/Reference/MKLocalSearch/Reference/Reference.html#//apple_ref/occ/cl/MKLocalSearch
add gpx file for 48 Wall St
automatically sets "my location" to here
extract latitude from MKLocalSearch object
enable markers for user input
uses MKLocationSearch to translate 'Englishy' input to latitude longitude
adds marker to map at selected spot
so far only handles queries with a single result, I think
made marker green
pull Farheen's changes
Merge pull request #4 from mhuerster/master

Add ability to display markers on map