Simple fix which allows the version 5 network model to validate against Bo's transition model.
Several core changes designed to improve overall performance of the discrete event engine: striding rate will greatly increase but freeing agents will occasionally be more expensive.

Updates to concepts to trim them down.
Merge branch 'master' of https://github.com/anl-tracc/polaris
Removed router v1 router files

Added new polymorphic (router v2) capabilities
Added capability for graph pools to create copies of themselves and re-establish pointer references relative to graphs in the new pool.
Merge branch 'master' of https://github.com/anl-tracc/polaris