Support for syncing classpath resources from filesystem in development environment

Some engineering developers use an external class reloading tool not for hot swapping compiled java code but for syncing other classpath resources such as js, json, css, etc. This is both cumbersome and unnecessary. A simple service module that reads the rebel.xml files and monitors the classpath directories found therein can do the same. We already have production quality code in the webfiles project for monitoring changes on the filesystem that we can use.