Trading-calendars

Changes:

- Bug Fix: July 3rd 2019 was a half day, July 5th 2019 was a full day.

Changes:

- Fix UTC Bug (thanks Froskekongen)
- Error message typo fix (thanks Swalloow )
- Added holiday to XSHG holidays (thanks txu2014)
- Shanghai Stock Exchange Website (thanks kuagtu)
- Script to generate cal-like trading calendars (thanks llllllllll )

This release adds the Nasdaq Nordic Iceland (XICE) exchange. Thanks oyvindwe!

This release adds the George H.W. Bush Day of Mourning for US markets.

This release adds the Korea Exchange (XKRX) for South Korea

This release fixes a bug in the India calendar.