build: Correct app version and enable automated upload to Google Play

Change-Id: I253bb795b65dfc4cff52c244c824d42f7fc71c17
diff --git a/build.gradle b/build.gradle
index 96a0a6d..e725ddd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,9 +3,13 @@
 buildscript {
     repositories {
         jcenter()
+        maven {
+            url "https://oss.sonatype.org/content/repositories/snapshots/"
+        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.0.0-alpha1'
+        classpath 'com.android.tools.build:gradle:2.0.0-alpha3'
+        classpath 'net.named-data.playground:play-publisher:1.2.0-2-SNAPSHOT'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files