Adding a non-namespace version of the namespace stylesheets and example files.

* Wrote utils/strip-ns to remove the namespace from the stylesheets.

* Added Makefiles to the entire tree to simplify creation of non-namespace files.

* Added a `make test` to attempt to build both the namespace and non-namespace versions of the files.

* Updated the installation to copy both versions into the same directory location as the docbook-xsl and docbook-xsl-ns.