2013-06-24-wise: Factor styling out into style.css

Don't repeat yourself.  This helps us keep styling consistent between
pages.
Merge branch 'wise-cleanups' into gh-pages

* wise-cleanups:
  2013-06-24-wise: Factor styling out into style.css
  2013-06-24-wise: Use CSS instead of <font> to style the welcome blurb
  2013-06-24-wise: Add 'alt' attribute to logo <img>
  2013-06-24-wise/test_install.html: HTML markup and indentation
  2013-06-24-wise/index.html: Cleanup HTML markup and indentation
  2013-06-24-wise/index.html: Use CSS instead of hardcoding <u>