Update index to include places api (#305)

docs/index.md

@@ -2,8 +2,12 @@
 
 The Mapzen Android SDK is a thin wrapper that packages up everything you need to use Mapzen services in your Android applications. It also simplifies setup, installation, API key management and generally makes your life better.
 
-## Greater than the sum of its parts
-Our SDK includes map rendering, search/geocoding, turn-by-turn directions, and location tracking. It's built using the following standalone libraries and services from Mapzen:
+# Mapzen Places API
+
+The Mapzen Places API is a drop in replacement for the Google Places API. It provides UI and data components to make interaction between search and maps extremely easy to integrate into your application.
+
+# Greater than the sum of their parts
+Together, these two libraries include map rendering, search/geocoding, turn-by-turn directions, and location tracking. They are built using the following standalone libraries and services from Mapzen:
 
 - **[Tangram ES](https://github.com/tangrams/tangram-es/)** Our 2D and 3D map renderer using OpenGL ES
 - **[Pelias Android SDK](https://github.com/pelias/pelias-android-sdk)** Mapzen Search client and custom `SearchView` extension