GSS now works for Firefox!
* Change main.js to load gssweb.contentscript.js intead of navigator.gss.js
* Make some attempts to convert gssweb.contentscript.js into something that
will work on both Chrome/Chromium and Firefox
* GSS Calls now work in firefox!
... authenticate doesn't yet work, because Firefox sends its content-type
with a character encoding
("application/x-www-form-urlencoded; Charset: UTF-8) which causes the
apache module problems with double-freeing memory, but that's a problem
for a different commit.