Moved jmtv design.psd and .html

I put them in the files folder so the directory is a little more easy to read at a quick glance
Centered the twitter feed

The twitter feed doesn't seem to respond to placing it in a column. I'm guessing this has to do with the way the javascript is set up. There is probably a better way to display this data without the giant iframe which is very slow-loading.
Added the class "text-center" as an alternate to "pagination-centered"