Added a packed jar bundle for testing.
Added a basic site with a design draft.
Added site and javadoc generation the app repo module.
Added support for deploying jar files.

- Renamed ApplicationRepository#get() to getDescriptor(), but not sure that the bundle
  descriptor is long for this world in light of using OSGi packaging.
Updated to reflect changes in the ApplicationRepository interface.
Added OSGi and Felix deps for the to-be-committed executor work.
Fixed a bug where getBundleSupplier(String) didn't include the app directory.

- getBundleSupplier() now returns InputSupplier<? extends InputStream> rather than
  simply InputStream. Not sure which is correct in this case just yet.
Committing a working POC of an OSGi container-based launcher.