Closes #121 - Combined properties classes into FluoConfiguration

Pull request for #121

Fluo Configuration extends Apache Commons Configuration. Created unit test and updated
implementation to use new configuration class.  Added methods to verify
if configuration is set properly for client, admin, worker & oracle.
Seems like somewhere the props that must be set for certain operations, should be documented.  Not sure where the best places is.   There are multiple places that could be.  Maybe the best place is the FluoFactory methods that take Configuration.  Putting it there would make it easy for a user.