DockBook warnings

[sml]

Trying to build HTML documentation for pykota 1.27 (SVN rev. 3554) with docbook2html from docbook-utils 0.6.14 caused docbook to spit some warnings. Attached patch makes docbook happy.

Another problem is that HTML docs don't get installed into /usr/share/doc/pykota/html/ as intended. Fix for that isn't included into the patch, because I didn't know where it fits best. Either change setup.py to search for HTML files in docs/*.html instead of docs/pykota/*.html

-docfiles = glob.glob(os.sep.join(["docs", "pykota", "*.html"]))
+docfiles = glob.glob(os.sep.join(["docs", "*.html"])) 

or change debian/Makefile.docs to let it build HTML docs in subdirectory docs/pykota/ instead of docs/

-        docbook2html pykota.sgml
+        docbook2html -o pykota pykota.sgml