Now detects disallowed newlines and carriage returns in input files.

R=neil.fraser@gmail.com

Review URL: https://codereview.appspot.com/20980043

git-svn-id: http://blockly.googlecode.com/svn/trunk@1467 c400ca83-b69d-9dd7-9705-49c6b8615e23
Adding icons to apps index page.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1468 c400ca83-b69d-9dd7-9705-49c6b8615e23
Fix aspect ratio on Maze icon.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1469 c400ca83-b69d-9dd7-9705-49c6b8615e23