INT-2932 TCP Connection Events - Doc and Polishing

INT-2932
- Reference Documentation

INT-2941
- Add getter for Throwable
- Add auto-startup to Parser, Endpoint (already in schema)
- Add phase to schema, Parser

(Schema changes are mostly indentation because the element now
extends SmartLifecycleType).
Merge pull request #752 from garyrussell/INT-2932

* garyrussell-INT-2932:
  INT-2932 TCP Connection Events - Doc and Polishing
INT-2951 Add Context Id to Dispatcher has no Subs.

Provide the context id in the 'Dispatcher has no Subscribers'
message.

Ease debugging when more than one context in an application.
INT-2951 Polishing

PR Comments - add quotes to context Id in log message.