I know I'm just burning karma here, but this really triggers me.

Andrew Ng gives you a free introductory course in one of the hottest topics in computing, and in exchange asks you not to do one thing. And you do that one thing. I have my solutions in octave, and it would be really convenient for me to back them up on github, but I keep them on a usb stick for this very reason. I am respecting the man's wishes who was so kind as to teach me about machine learning.

You should take them down if you don't have the explicit permission to share them as the honor code states. You don't have explicit permission, do you?