OKHTTP 2.0 upgrade
Refactor getResponseCache to getCache
Path example incorrect

The `PathOverlay` example passed `this` for the `width` parameter and used some `GeoPoint`s for the path points instead of supported doubles or `LatLng`s.
Merge pull request #479 from vesse/patch-1

Path example incorrect
Merge pull request #477 from 955dreams/mb-pages

Upgrade OkHttp to 2.0
#480 Updating Android Support Library to 20 and Gradle Build Tools to 0.12.2
upstream merge