Add Date Column to the output of get_dailyQuote_twse and Finish Studying Issue #4

## Add "Date" column to the output of get_dailyQuote_twse(date)
Demo ipynb
http://nbviewer.ipython.org/github/dboyliao/PyCrawlers/blob/master/dev_ipynbs/dboydev/Dev_Dboy20141006_twse_DailyQuote_packaging.ipynb

## Finish Studying the Issue No.4
ipynb:
http://nbviewer.ipython.org/github/dboyliao/PyCrawlers/blob/master/dev_ipynbs/dboydev/Dev_Dboy20141007_dailyOtcStockQuotes_study.ipynb