Pushed request parser into a dependency.
Limits clients to listen to an account ID.

- Connect with /listen/{accountId}.
- Reports the type of message and when it occurred.
- Places notifications on a separate EventEmitter.
- Adds a pingback to clients which includes the account ID.
- Pushes ClientList into a dependency.
- Includes the raw body in the message per event.
Merge pull request #2 from Codesleuth/#1-Add-account-ID-client-security

#1 add account id client security