Added the images for mounds/holes of overflowing sizes. Also moved level 7, 8, 9 to appear at level 3, 4, 5. Instructions need to be updated, as well as markers which need graphics help.
Updated the ideal blocks and start blocks after the level moving around.
Changed Karel 2 Leve 6 to be fill 8 and remove 8.
Added the start blocks for Karel 2 Level 7, and also put the obstacles in it. Need to update the obstacle image.
Added the cow.png image as the the obstacle.
Changed the Farmer tutorial to have number on their names (Farmer 1, Farmer 2).
Merge remote-tracking branch 'code/mooc' into mooc
Added definition of BlocklyApps.MODE to common.js, and changed associated code.
Updated based on Toby's review.
Added jsdoc for the parameters of the new functions.
Changed different sections in template.soy to have different meaning field.
Removed the conflicts of message meaning.
Added Karel compilation command into common.soy.
Added type to BlocklyApps.MODE_ENUM for jsdoc.
Removed the trailing comma.
Merge pull request #14 from nanan9177/mooc

Changes to Karel based on yesterday's discussion