Adding Project model object and making some fields optional.
Adding new Project Model Object.
Merge pull request #114 from javierhe/master

Fix subtle bug in getOutputLinkIndex() (we are using the wrong link counter)
Merge pull request #115 from andrewbts/null-and-list-handling

Null and list handling
Updating to new controller schema.
Merge pull request #116 from mnjuhn/dev

Updating to new controller schema.
Correcting issue when trying to get density value after de-serializing from xml.
Merge branch 'dev' of github.com:mnjuhn/model-objects
Merge pull request #117 from mnjuhn/dev

Correcting issue when trying to get density value after de-serializing f...
Add method to query FD by offset time
Updating schema to have target_actuator and feedback_sensor objects which link usage to actuator/sensor.
Adding target_actuators and feedback_sensors to Controller.
Merge pull request #118 from mnjuhn/dev

Updating Schema for Controller MO
Merge branch 'dev' of github.com:calpath/model-objects
Adding Actuator Model Object
Adding Actuator model object unit test.
Merge pull request #119 from mnjuhn/dev

Actuator Model Object
Merge branch 'dev' of github.com:calpath/model-objects