remove extra contributors

Contributors shows up on two lines on my monitor and I don't like the
way it looks.  This will remove enough of them (starting with the last
one) that the whole footer will only take up one line.
Add a link to view all contributors on github
do it on document.ready

otherwise this doesn't always work for me, especially when I test it
locally. Actually, I had this problem before, too--when I first started
doing this, I noticed that about 20% of the time, it never got the list
of contributors.