Implement microformats and calendar export

[Igor Santos]

Microformats seems to be something useful and nice to have. However, no browser currently supports it without using extensions, so it's of little real-world usage. However[2], it's something very easy to implement.

• http://microformats.org/wiki/hcalendar-intro
• http://microformats.org/wiki/hcalendar-authoring
• http://microformats.org/code/hcalendar/creator
• http://microformats.org/wiki/hcalendar-cheatsheet
• http://microformats.org/wiki/hcalendar-examples-in-wild

Similar to microformats, we need to implement the webcal protocol, allowing users to export individual events and activities to their Google / Outlook / Apple calendars. There should be an option to create a custom calendar in their Google Calendar as well, with everything they mark as "want to go".