Pack up the crawler for otc data. / close #4

Package: package: pycrawlers.examples.gretai.crawlers

*function* get_dailyQuotesOTC_gretai
*Input*: date, a string of date with format yyyy/mm/dd
*Output*: A list of pandas data frame found on following webpage at user-specified date.
http://www.gretai.org.tw/web/stock/aftertrading/DAILY_CLOSE_quotes/stk_quote.php?l=en-us

Demo ipynb:
http://nbviewer.ipython.org/github/dboyliao/PyCrawlers/blob/master/dev_ipynbs/dboydev/Dev_Dboy20141007_dailyOtcStockQuotes_packaging.ipynb