fire jsdocCommentFound and symbolFound events in the correct order (#770)

On Rhino, for each file, we now fire all the jsdocCommentFound events in source order, followed by all the symbolFound events in source order. This behavior is consistent with previous versions of JSDoc.

On Node.js, we now fire interleaved jsdocCommentFound and symbolFound events in source order.

Includes a new Rhino .jar file: jsdoc3/rhino@5fbcc2d953f4ab451f827e0315ebf09124d1f274