Set up a very basic layout for the app. I added real google maps and lib...

Set up a very basic layout for the app. I added real google maps and libs to the repo. I used my own google api key, but I think we should set up a group account to use for this instead of using someones personal key. Changed Main.xml with a basic layout with a map and buttons to call, and changed SafeWalk.java with some very basic code to load the map and have a get current location button