[DDF-456] Move to slf4j
[DDF-456] Revert unwanted version bump

Thanks to Shaun Morris for finding this in review.
Merge pull request #5 from bradh/DDF-456

[DDF-456] Move to slf4j
Reviewed by: @shaundmorris and @mrmateo
DDF-472 updated to use admin 1.1.0-SNAPSHOT and catalog-2.5.0-SNAPSHOT
DDF-458: Updated to build on JDK7 and JDK8.
Merge pull request #6 from bradh/DDF-180

DDF-180 Remove System.out.println usage
Reviewed by: @mrmateo