New controller schema changes.
Adding feedback sensor and target actuator objects.
More Controller MO Tweaks.
Merge branch 'dev' of https://github.com/calpath/model-objects
Merge pull request #136 from mnjuhn/dev

Dev
Merge branch 'dev' of https://github.com/calpath/model-objects
Get actuator from set by numerical ID
Merge pull request #137 from andrewbts/cc-framework-beats-controller-actuator-merge

CC-framework beats controller actuator merge
Adding target actuators and feedback sensors to Object Factory.