Refactoring class access and other small adjustments.

Make MimeType a class of StaticFileHandler.  Make classes not needed publically package access only.
Merge remote-tracking branch 'upstream/master'
Delimit Text serialization to return the requestId with the result.
Remove webSocketRoute configuration option

Change "init" op method to "version".  Fix vertical alignment of gremlin prompt in REPL console.
Merge remote-tracking branch 'upstream/master'
Put requestId in each returned message for JSON serialization.
Improve error reporting back to the client.
Merge remote-tracking branch 'upstream/master'
Tighten up web front end

Add request id processing.  Refactor web socket code to allow automatic reconnection.