Start "fresh" in clcommon with package ucar.thredds.catalog
First attempt to get end-to-end catalog handling in ucar.thredds.catalog. (Need tests.)
Update cdm and clcommon pom.xml files for ucar.thredds.catalog work.
Get CatalogBuilderTest working with both simpleimpl and straightimpl.
Add StAX parsing and writing for catalogs, add tests.
Use both straightimpl and simpleimpl in StAX parse/write tests, fix tests so work with simpleimpl (can't build and then use Builder).
Start adding Property
Add Property handling to both straightimpl and simpleimpl versions of Catalog and CatalogBuilder, still need Cat tests.