Added some space at the bottom of examples, such as on http://php.net/manual/en/control-structures.foreach.php#control-structures.foreach.list
Merge branch 'pull-request/13'
Tinker with the positioning of the what-is-php block on the home page.

With two releases, this should be identical to the previous positioning. With
more than two releases, the text is vertically aligned, then moved ever so
slightly up to avoid the feeling of the chunky Begin Tutorial button being too
far off centre.

This has mostly been done by feel, so everyone else may find this horrible, but
I think it's an improvement on the previous iteration where that block was just
at the top.
Renaming alpha references to beta
add uservoice widget to beta site
[beta theme] improving readability of user contributed notes
[beta theme] reverted actual user contributed notes, code back to monospace font.
[beta theme] reverted actual user contributed notes, code back to monospace font.
[beta site] reverting the ambitious font family change for user contributed notes and just making their font larger
[beta site] Added bolding of <em> tags that were removed on the new design.