- Minor update to rst_template/bk_main.xml to use namespace reference
"xl" instead of "xlink" to be compatible with herold output
- Create new opf_html2db.py script to convert singlehtml output of projects
using herold and then massage into OPF format for inclusion in rst_template
format
Signed-off-by: Jeff Scheel <scheel@us.ibm.com>