Update README.md
Update README.md

Added 'git init'.  Removed trailing period after command.
Merge pull request #5 from espertus/mooc

Update README.md
Update README.md

Updated based on walkthrough with Ellen.
Minor improvements:
- Removed answer check on Level 10.
- Removed TODOs from interstitials.
- Corrected broken hints.
Merge pull request #6 from espertus/mooc

Minor improvements:
Update README.md
Merge pull request #8 from nanan9177/mooc

Updated Karel Based on the Feedback
Fixes trashcan bug.
Merge pull request #9 from espertus/mooc

Fixes trashcan bug.
Removed language menu from Maze and Turtle.
I didn't feel comfortable changing Bird and Farmer, but their
owners can change them by commenting out or removing the definitions
of languageMenu in their template.soy files.
Merge pull request #10 from espertus/mooc

Removed language menu from Maze and Turtle.
Merge remote-tracking branch 'code/mooc' into mooc
Added definition of BlocklyApps.MODE to common.js, and changed associated code.