Also update README with dependency change

Signed-off-by: Eddie Ringle <eddie@eringle.net>

Author: EddieRingle

README.md

@@ -38,7 +38,7 @@ Alternatively import the `/library` project into your Android Studio project and
 
 The library is currently configured to be built via Gradle only. It has the following dependencies:
 
- * Android Gradle plugin v0.6.3 - `com.android.tools.build:gradle:0.6.3`
+ * Android Gradle plugin v0.7.+ - `com.android.tools.build:gradle:0.7.+`
  * Android Support Library v19 - `com.android.support:support-v4:19.0.+`
 
 Still use Eclipse/building with Ant? You can still use AndroidStaggeredGrid, it's just a few extra steps (left up to the read).