[#53420683] Updates the "Download group events to your personal calendar (.ICS file)" page on the knowledge base and updates the "Download group events for spreadsheet display (.CSV file)" page on the knowledge base.

-- Download group events to your personal calendar (.ICS file) --

![fullscreen_12_20_13__8_51_am](https://f.cloud.github.com/assets/2251119/1791038/3fa72e02-6986-11e3-925b-1d0118b6b821.jpg)


-- Download group events for spreadsheet display (.CSV file) --

![fullscreen_12_20_13__9_10_am](https://f.cloud.github.com/assets/2251119/1791205/d6bcfc70-6988-11e3-9c88-f63e1014f5aa.jpg)