use AbstractForwardVehicleRoutingTransportCosts
introduce AbstractForward...Costs to simplify cost-def
inspect and remove warnings
inspect and remove warnings
Merge branch 'master' of https://github.com/jsprit/jsprit.git
eliminate "maven-enforcer-plugin (goal "enforce") is ignored by m2e"
warning

http://stackoverflow.com/questions/13040788/how-to-elimate-the-maven-enforcer-plugin-goal-enforce-is-ignored-by-m2e-wa
Merge branch 'master' into route-events