Merge pull request #32 from dboyliao/master

Finish Studying Taifex Historical Data Crawler
Create README.md
crawl youtube playlist meta data, close #34 and close #35
Merge pull request #36 from c3h3/master

crawl youtube playlist meta data, close #34 and close #35
add a new field updated to video meta data
Merge pull request #37 from c3h3/master

add a new field updated to video meta data
Merge pull request #33 from dboyliao/master

Closing #11
update yhstock ipynbs
packing yhstock apis
Merge pull request #39 from c3h3/master

merge yhstock
update yahoo major crawler
Merge pull request #40 from c3h3/master

update yahoo major crawler
modify error log
Merge pull request #41 from c3h3/master

modify error log
change the data type in yahoo stock major data
Merge pull request #42 from c3h3/master

change the data type in yahoo stock major data
[Debug] add fillna(0) before convert to int
Merge pull request #43 from c3h3/master

[Debug] add fillna(0) before convert to int
Add __init__.py under taifex/ .