JDF-639 Converted the JAX-RS resource classes to SLSBs.

This now ensures that the root-resource classes now comply with
the requirements outlined in JAX-RS 1.1, namely that JAX-RS
providers supporting EJBs allow SLSBs as root resource classes
(with no mention of SFSBs).

Since JAX-RS root-resource classes are request-scoped by default,
the CDI RequestScoped annotation is redundant and thus removed.

Also removed unused imports.
[JDF-681, WFK2-538] - Fix type in helloworld-gwt README.
WFK2-534 Constrain subdirectory search to immediate children.

This ensures that Cordova plugins containing README.md files are
not processed to generate README.html files.
[WFK2-521] - Fix type on spring-kitchensink-* README.