BasePort: fix isConnected() when no socket are attached
Merge pull request #233 from djdeath/fix-exception-isconnected

BasePort: fix isConnected() when no socket are attached
Fixed a bug: IIPs sent twice to addressable ports.
Merge branch 'master' of https://github.com/noflo/noflo into iips_for_addressable_ports_fix
Merge pull request #241 from trustmaster/iips_for_addressable_ports_fix

IIPs are sent twice to addressable ports
Subscribe to sockets earlier so debugging works even when components throw errors