Refactoring opt

[eigen-value]

New features and optimizations in this PR:

• revert to ITransport based server/client constructors (Stream based can lead to Decoders duplication)
• improvement: servers won't bind a name twice
• threading prep: break down of client/server RPC methods into I/O-bound incoming vs. outgoing ops and user defined callbacks execution
• Utilities: Dispatcher callbacks can be tagged
• utils: unpackTypedArray
• mod: server holds a copy of request to be processed -> to be modified eg as a dynamic copy local to the run method
• fixes & optimizations

[gbr1]

LGTM