Consider automating calendar updates

[bjpatterson]

Currently, the calendar of upcoming economic releases is updated manually every ~year.

This year, we built a web scraper to get most of this data automatically. We might consider adding/reworking this scraper into this site to reduce the manual upkeep needed.

Potential Tasks:

• Integrate the scraper into site in some way
• Figure out how to translate the source's "Release" into our own release categories
• Build in some kind of reporting mechanism (so that we get notified if the updates stop working)
• Consult with Srikant for some release dates that are missing but consistent
  (e.g. "this particular release is always on the last Thursday of a quarter", etc.)
• DoD: The economic indicators calendar updates automatically, with minimal human intervention