Fix sticky highlighting of toolbar blocks in IE 11 (issue 217)

git-svn-id: http://blockly.googlecode.com/svn/trunk@1666 c400ca83-b69d-9dd7-9705-49c6b8615e23
Prevent IE from overflowing SVG beyond image.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1667 c400ca83-b69d-9dd7-9705-49c6b8615e23
Remove arrow character test from compile Maze files.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1668 c400ca83-b69d-9dd7-9705-49c6b8615e23
Add keyboard focus to dropdown and context menus.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1669 c400ca83-b69d-9dd7-9705-49c6b8615e23
Stop supressing touch events outside Blockly.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1670 c400ca83-b69d-9dd7-9705-49c6b8615e23
Increase hotspot area of trashcan.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1671 c400ca83-b69d-9dd7-9705-49c6b8615e23
Add an optional visual list of current document collaborators.

Fixes issue 197.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/80700047

git-svn-id: http://blockly.googlecode.com/svn/trunk@1672 c400ca83-b69d-9dd7-9705-49c6b8615e23