fix #6 added contracts project
fixed #7 added service implementation project
fixed #8 added service proxy project
#9 added assembly manager contracts
#9 added assembly manager contracts
#9 added assembly manager contracts
#9 added plugin manager service implementation from RExec project
#9 added executor contracts
#9 added executor service implementation from RExec project
#9 changed executor service to duplex service
added plugin test project
in the process of converting to progress reporting and cancellable in other appdomain
progress reporting and cancellation in other appdomain supported
#9 completed executor service implementation
#9 completed executor client implementation
refactored PluginManagerTest
#5 changed future to internally use hot observable
modeling cleanup
simplified observables
reverted attempt at auto-cleanup