Creating a -main with an integration option.

This is a checkpoint commit adding the vignette.core/-main
and an integration option for testing the thumbnailer using
the image samples.
Running jar.
Merge branch 'master' into running-uberjar

Conflicts:
	project.clj
	src/vignette/media_types.clj
Merge pull request #8 from Wikia/running-uberjar

Running uberjar for the server