Merge pull request #30 from alexeygoder/master

Adding DemandProfile
Merge pull request #31 from mnjuhn/master

Changing network node and link type to hold id's as well as strings
added fields to xsd to conform Sensor and VehicleType to DB
Merge pull request #32 from sean-morris/master

Clean up SplitRatioSet and SplitRatioProfile
Adding DemandProfileFactory
Merge pull request #33 from alexeygoder/master

Adding DemandProfileFactory
Changes to Node MO and pom
Adding XML and JSON unmarshaller and marshaller with Unit Test