Add textAlign with 1 or 2 args and add 1 or 2 args to color in functionP...

...aramCount.

textAlign may be used with one or two arguments : http://processingjs.org/reference/textAlign_/
color() may be used with 1 to 4 arguments : http://processingjs.org/reference/color_/

Pamela asked me to submit a patch https://www.khanacademy.org/cs/textalignalign-yalign/4508437190803456 I added the change to color() as well... I don't have a Khan sandbox set up, but the change is pretty simple and should just work.