Included .md as a supported Markdown file extension

git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Developer/Services/DocGenerator@10253 7b3f36aa-e6db-49c1-8b4c-66eac1997e64
Experimental changes to the documentation styling

git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Developer/Services/DocGenerator@10254 7b3f36aa-e6db-49c1-8b4c-66eac1997e64