Simple standalone sample apps

It would be great to have really simple standalone sample apps for the most important features.

The sample apps should have a main method each, write to System.out, and be in the test source tree or in a new 'examples' tree, in jackrabbit-core (and / or in another project).

Then for each of those sample apps there should be a test that redirects System.out to a ByteArrayOutputStream, calls the main method, checks if the output is correct. Like that the sample apps don't get out of sync.