Adding KML class
Moving to Sync API and Sync all different items
Fix: bug in setting the states of the samples/current location/location history
Updating sync center. Adding serializer + support for both Maps and Kmls
Merge branch 'master' of https://github.com/CMUPracticum/TrailScribe
Merging Sync Center
Merged in cmu/master
KML.java should be named Kml.java