Allow Turtle workspace to resize.  This involves moving Blockly out of an iframe and into a div.  Borders need to be tweaked to enable consistent rendering.
Review URL: https://codereview.appspot.com/8422045

git-svn-id: http://blockly.googlecode.com/svn/trunk@739 c400ca83-b69d-9dd7-9705-49c6b8615e23