Added an example of a dynamic MBean to the test web application
Add the new files
Added some fitnesse tests for the SystemPropertiesMBean
Removed the Guice stuff from the FitNesse fixtures because it wasn't really buying us anything.  And besides, I want to make the MBean-related fixtures work with MBeanServers other than the platform MBeanServer in the local (FitNesse) JVM.
Merge pull request #22 from DavidWhitlock/master

Example dynamic MBean in the test web application