Merge branch 'hotfix/README'
Merge branch 'release/predictionio-predictionio'
Merge branch 'release/mortardata-mortar-recsys'
Merge branch 'release/cloudera-oryx'
Merge branch 'release/easyrec-easyrec'
Merge branch 'release/myrrix-myrrix-recommender'
updating all submodules
Merge branch 'hotfix/updating_all_submodules' into develop