Update Travis CI support

.travis.yml

@@ -1,17 +1,25 @@
 language: android
+sudo: false
 git:
   submodules: false
 before_install:
   - git submodule update --init --recursive
-script:
-  - export JAVA_OPTS="-XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx2048m"
-  - export TERM=dumb
+before_script:
   - echo sdk.dir $ANDROID_HOME > local.properties
-  - ./gradlew assembleDebug -x lint
+script:
+  - export TERM=dumb
+  - export JAVA_OPTS="-XX:MaxPermSize=1024m -XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx2048m"
+  - ./gradlew build
 android:
   components:
-  - extra-android-m2repository
-  - build-tools-23.0.1
+  - platform-tools
+  - tools
+  - build-tools-23.0.2
   - android-23
-
-
+  - extra-android-m2repository
+before_cache:
+  - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
+cache:
+  directories:
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/