Added VarysInputStream.
VarysInputStream bug fix, interface update, and code reorganization.
Added VarysOutputStream.
Bug fix in actorSystems’ names.
Examples that use VarysInputStream and VarysOutputStream.
Now we need to make them respond to the schedules.
Updated BroadcastService to use Varys streams.
Removed old examples using the deprecated API.
Cleaned up VarysClient. It’s primary function now is to register and unregister coflows. 
Also, removed DataServer. Serving data isn’t our job.