Add removeDeadLinks.py

removeDeadLinks.py runs through each .html file in your static
directory, parses through each Wiki hyperlink and checks to see if the
linked-to file exists.  If so, then it keeps the link, and if not, it
unwraps the link using BeautifulSoup.
Update README
Merge pull request #3 from trivisonno/removeDeadLinks

Remove dead links