updated ReadMe for macosx users
print statement deprecated incompatible with 3.0+
Macosx Notes typo
Issue #129: Added run.py for server code.

Partial checkin to see if I'm on the right track.
Merge pull request #132 from uwecerron/master

print statement deprecated incompatible with 3.0+ and Macosx additional notes
Merge pull request #133 from jimmysong/129

Issue #129: Added run.py for server code.