Add RetroLambda to project and fix use of HomeFragment

App was skipping the use of HomeFragment entirely, called
the HomeActivity onGoButtonPressed directly via the onClick
xml attribute. When using a fragment with activity,
ensure the following:
  - Activity extends android.support.v4.app.FragmentActivity
  - XML fragment definition has the class attribute properly set
  - Your Activity uses the activty xml layout
Move api_keys.xml.template to xmltemplates

Cannot leave in same dir as api_keys.xml because the build fails
due to missing api_keys.xml.template file. So, just put it in a
different dir outside the app source.
Add Address EditText field to retrieve votinginfo data
Remove unused HomeActivity imports
Remove RetroLambda from global build.gradle
Merge pull request #4 from votinginfoproject/feature/home-view-ui

Home View UI (Unstyled)