Update build tools version to 19.1 and set java to 1.7

Clover/app/build.gradle

@@ -2,7 +2,7 @@ apply plugin: 'android'
 
 android {
     compileSdkVersion 19
-    buildToolsVersion "19.0.2"
+    buildToolsVersion "19.1"
 
     Properties versionProps = new Properties()
     versionProps.load(new FileInputStream(file('version.properties')))
@@ -20,6 +20,11 @@ android {
         versionCode versionProps['code'].toInteger()
     }
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_7
+        targetCompatibility JavaVersion.VERSION_1_7
+    }
+
     Properties props = new Properties()
     props.load(new FileInputStream(file('keys.properties')))