JMX support

Today, I added initial JMX support to ESXX, which means that you can now use JConsole or VisualVM (with the MBeans plug-in) to view the loaded server-side Rhino-powered JavaScript applications, plus some statistics about them (when the app was (last re-) started, when it was last active, how many requests the app has handled and wall-clock execution time).

Pretty neat. It's also possible to unload an application from memory using the JMX console.

Dustin's The JMX MXBean and Eamonn McManus's What is an MXBean? were of great help — read them if you're interested in adding JMX to your own projects!