Merge pull request #8 from p2t2/DEV2.4.0

Dev2.4.0
Merge pull request #10 from p2t2/DEV2.4.0

Dev2.4.0
One-line commands to query predicates
Initial implementation of containers library
Merge pull request #303 from apfeffer/DEV2.4.0.0

Dev2.4.0.0