treat #REDIRECT as case-insensitive
make the first letter in Category and Disambig pages case-insensitive

see:
   http://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Linking
   "However, links are case-sensitive for all but the initial character."

   http://en.wikipedia.org/wiki/Help:Template
   "Template names are exactly like other page names: case-sensitive except for the first letter"
recognize both the {{disambig}} and {{disambiguation}} disambiguation templates
add redirect page field