[sorno_stock_quote.py] Get a stock quote from yahoo

Test Plan:

$ python scripts/sorno_stock_quote.py yhoo
2014-03-04 11:33:22 INFO __main__:70: URL:
http://download.finance.yahoo.com/d/quotes.csv?s=yhoo&e=.csv&f=sl1d1t1c1ohgv
name: "YHOO"
price:  39.44
date: "3/4/2014"
time: "2:18pm"
change: +1.19
open: 38.74
high: 39.79
low:  38.68
volume: 11868590