Routine recompile.  Remove obsolete wiki pages.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1735 c400ca83-b69d-9dd7-9705-49c6b8615e23
Add prompt block with external message.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1736 c400ca83-b69d-9dd7-9705-49c6b8615e23