Remind user to always run "brew update" first in order to avoid
repeated bug reports from users who didn't do that.
See #824, #1067, #1537, #1633 and #1749
Found on @spf13's Twitter. :-)
Prevent the testimonial dates from wrapping.
Also fix a few minor problems to get the home page
to validate as proper HTML5.
updated installation page of documentation, and changed "Download" button on index.html to scroll to bottom where multiple installation options are featured
getting the scrolldown to work required removing the fixed positioning on #action and on the footer
