Merge pull request #25 from akurzhan/master

Joel's December changes
Re-imported all MM networks with updated model-elements library per Alex
Merge pull request #26 from andrewbts/master

Re-import all MM networks
Remove redundant includesFlows field
Regenerate model-elements-base classes
Add includesFlows() method to determine whether the report contains flow information
Add check for whether flow state map is included
Add covariant getMean() method, fix bug in includesFlows
Covariant overrides from model elements base -> model elements
Utility for extracting sub-list of origin links from list of all links
Merge pull request #27 from andrewbts/master

Remove redundant includesFlows field
Add fields to config object for mean and st-dev of additive velocity function noise
Re-export all MM networks
Merge pull request #28 from andrewbts/master

Add mean & std-dev of velocity function noise to FreewayContextConfig
Initial stub for SimpleSplitNetwork model elements example network
Simple split network in progress
Add covariant override
Merge pull request #29 from andrewbts/master

Add covariant override for convenience