Updated to latest gradle plugin

app/app.iml

@@ -91,7 +91,6 @@
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" exported="" name="appcompat-v7-22.1.1" level="project" />
     <orderEntry type="library" exported="" name="palette-v7-22.1.1" level="project" />
-    <orderEntry type="library" exported="" name="core-1.51.0.0" level="project" />
     <orderEntry type="library" exported="" name="jsoup-1.8.1" level="project" />
     <orderEntry type="library" exported="" name="support-v4-22.1.1" level="project" />
     <orderEntry type="library" exported="" name="support-annotations-22.1.1" level="project" />

build.gradle

@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.2.2'
+        classpath 'com.android.tools.build:gradle:1.2.3'
     }
 }