Annotation is broken

[changbaishan]

We know it is old code. However, people at twitter are using and recommending codes that depend on it. So the broken annotation should be fixed so that at least we can build it with maven.

[ERROR] error: error while loading AnnotatedElement
[ERROR] one error found
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 21.861 s
[INFO] Finished at: 2016-05-31T12:25:27-04:00
[INFO] Final Memory: 19M/280M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal net.alchim31.maven:scala-maven-plugin:3.1.0:compile (default) on project joauth: wrap: org.apache.commons.exec.ExecuteException: Process exited with an error: 1(Exit value: 1) -> [Help 1]