Cal-CS-61A-Staff/ok — pull request #189 by Sumukh (2014-09-16 23:25:45+00:00)
Title: Graceful error messages for the OK client 

See #184 for details.
The basic concept is to display graceful error messages for when we know ok is going to crash.

```
$ python ok
ok requires Python 3.
For more info: http://www-inst.eecs.berkeley.edu/~cs61a/fa14/lab/lab01/#installing-python
``