Add hibernate-spatial to hibernate module

The use of GIS extensions is becoming more prevalent. It would be very helpful if org.hibernate:hibernate-spatial was added to the the hibernate module.

hibernate-spatial SEEMS to also require the following jars/packages :
org.hibernate:hibernate-spatial
org.geolatte:geolatte-geom
com.vividsolutions:jts-parent

So, jars would need to be added to modules/system/layers/base/org/hibernate/main and associated <resource-root> tags in module.xml

I believe <dependencies> would also require <module name="org.slf4j"/> entry

Note: The "Create Issue" page defaulted this item to "Major" but it is labeled as (FOR USE BY COMMITTERS ONLY) so I did not change it. I would have chosen "Minor" as this would be really useful but of course doesn't break or stop anything.