allow XHTML inside wadl:doc

Hi,

with the current version of your wadl.xsl any tag inside a wadl:doc-tag is discarded upon displaying.
To me a nice documentation should contain e.g. new-lines to be easy to read. To achieve this XHTML-tags like <p/> or <br/> are required.

I modified the wadl.xsl to copy tags contained in wadl:doc-tags for wadl:application and presumably most other wadl:doc-tags.

Please have a look into this pull-request.

Regards

Matthias