Merge branch 'hotfix-0.6.4'
Merge branch 'release-0.6.5'
Merge branch 'release-0.6.6'
Merge branch 'release-0.6.6'
Prepare 0.6.7 release
Merge branch 'release-0.6.7'
Adding trending folder to itemrec with DataPreparator from the sandbox
Merge branch 'master' of https://github.com/jfeinstein10/PredictionIO into develop
Merge branch 'develop' of https://github.com/jfeinstein10/PredictionIO into develop