Merge pull request #220 from hayesmg/master

InPort send defaults only when not connected; resolves #219
Improved disconnect forwarding for async components, fixes #216 for now. Node: `ordered: true` has to be used with `async` components if order of disconnects matters.
Merge pull request #223 from trustmaster/master

WirePattern: ordered async disconnect forwarding
Link to the NoFlo Support page