Bump build tools version to 18.0.1
Don't require GPS/location hardware feature. Fixes public issue 41
Add xxhdpi info window asset. Fixes public issue 43.
Remove a bunch of JARs in favor of gradle dependencies
Update for Google Play Services 3.2.65
Update DevSite API to v1.17

Updated DevSite API to new a fresh JAR, built against Google API client
v1.17.0-rc.

Also updated project dependencies so that only API client v1.17.+ will
be used, to prevent future breakage.