Switch to Gradle. Use git log --follow for history.

This converts the project into a multi-module Gradle build.

By default, Git does not show history past a rename, so use git log
--follow to see further history.

.travis.yml

@@ -5,7 +5,5 @@ before_install: chmod +x gradlew
 install: ./gradlew setupCIWorkspace -S
 matrix:
   include:
-  - jdk: oraclejdk7
-    script: mvn clean package
   - jdk: oraclejdk7
     script: ./gradlew build -S