Add CircleIO config.

Change-Id: Iabf095a5fffe2c64d35b614b4242315206be21f1

circle.yml

@@ -0,0 +1,9 @@
+---
+
+dependencies:
+  override:
+    - ./gradlew --refresh-dependencies dependencies
+
+test:
+  override:
+    - ./gradlew --refresh-dependencies check -x findbugsMain -x findbugsTest