Allow code generators to customize indent.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1700 c400ca83-b69d-9dd7-9705-49c6b8615e23
Comments in IE now readonly due to lack of foreignobject support.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1701 c400ca83-b69d-9dd7-9705-49c6b8615e23
Fix touch event in Maze/Turtle.  Fix trace highlighting.  Show alert editor on tablets.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1702 c400ca83-b69d-9dd7-9705-49c6b8615e23
Fix total failure of touch in highly-compressed apps.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1703 c400ca83-b69d-9dd7-9705-49c6b8615e23
Modify angle input to be easier to use on touch screens.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1704 c400ca83-b69d-9dd7-9705-49c6b8615e23