Script tags should be the last thing on the page

Having all scripts in the head of the page is considered a bad thing.
This moves scripts to the bottom of the page, rather than the top. You
can read more about why you might want them at the bottom here:

http://developer.yahoo.com/blogs/ydn/posts/2007/07/high_performanc_5/
Update test name to reflect what it tests
Merge pull request #41 from alphagov/scripts-at-the-end

Script tags should be the last thing on the page