Also add some javascript to automatically change that status to
"In Progress" when the issue is assigned to someone, and "Clang ToT"
when the issue is closed.
Note that the feature entries will still need to be manually updated
with the first version of clang that they appear in once they have
been completed.
HTML nit: these attributes should use " instead of ' (ooh, and ditto in the actual HTML on lines 961 etc.)