Create mkt_update.py

Provides on demand market updates at the cml, using data supplied by quandl.

Included: Dow Jones, S&P 500, Nasdaq, Russell 2000, Nikkei, Euo/USD, JPY/USD, Crude Oil (WTI).
Others can be add from the Quandl website (https://www.quandl.com/).

For Linux users: 
To allow the script to be used no matter what directory you are in. Place it in a directory that has been added to your PATH.
Then, while in that directory paste and run this command in the terminal:
$ chmod +x mkt_update.py
This will allow the script to be executable.
From then on you can receive market updates by simply entering the scripts name, mkt_update.py, into a terminal, regardless of the current directory.

For all users:
This program assumes that you have the Quandl library, can be obtained here: https://www.quandl.com/help/python
Also, that you have python2 installed with all base libraries.