TIdy up gradle and manifest

android/java/app/build.gradle

@@ -8,11 +8,18 @@ android {
         applicationId "com.mapbox.mapboxgl.app"
         minSdkVersion 14
         targetSdkVersion 21
+        versionCode 1
+        versionName "0.1"
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_7
+        targetCompatibility JavaVersion.VERSION_1_7
     }
 
     buildTypes {
         release {
-            runProguard false
+            runProguard true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
         }
     }

android/java/app/src/main/AndroidManifest.xml

@@ -1,8 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.mapbox.mapboxgl.app"
-    android:versionCode="1"
-    android:versionName="0.1" >
+    package="com.mapbox.mapboxgl.app" >
 
     <application
         android:allowBackup="false"