Refactor the WorkConfigTest to accomondate new WorkConfig requirement
Refactor the uploadWorkConfig (handleWorkConfig)
*Previours Version: The front-end graph updates is accomplished in
Master.java, which is not a proper design. Besides the validation of
Flow was handled in Master as static method, which doesn't seem right
either.
*Current Vesrion: The updates are handled by WebClientGraph.java. The
validation method is put into WorkConfig.java
Add addNode() method to update graph when some new Node is added to the
system.
Refactor the WorkConfig and its components.
Refactor the SimpelFlowTestCase to accomondate new WorkConfig
representation.
Delte all unused classes
Merge branch 'master' of
https://github.com/cmusv-sc/Practicum2014-Ericsson-Media.git

Conflicts:
	src/main/java/edu/cmu/mdnsim/server/Master.java
	src/main/java/edu/cmu/mdnsim/server/WebClientGraph.java