Java SDK ASF Release

[Donald Szeto <do...@apache.org>]

Hi all,

I have prepared a new version of Java SDK that will be compatible for its
first ASF release. The pull request is at
https://github.com/apache/predictionio-sdk-java/pull/6. I am notifying the
dev mailing list because the change is quite substantial, so any feedback
would be highly appreciated.

There is no change in the API. Here's a short list of changes:
- Fixed Javadoc build errors
- Apache package name
- RAT license checks
- Added Google code style checks (except inconsistency between the official
guide and the Maven plugin, plus casing that would change the API signature)
- Added FindBugs
- Cross build on Travis to all applicable JDK versions

I will cut a release if there is no objection.

Regards,
Donald