Update URLs for Malaysian code lists

This updates the URLs for the state and country codes as published by
the National Registration Department of Malaysia and changes the parsing
to the new page layout.

This also updates the data file.

https://github.com/arthurdejong/python-stdnum/issues/14
Update NRIC tests
Add stdnum.cn package for Chinese (PRC) numbers
Download locations from the China (PRC) government site
Support the Resident Identity Card Number of People's Republic China
Add Chinese Resident Identity Card Number