Ship with an event type vocabulary

Problem/Motivation

Events very often will have a type, e.g., meeting, concert. Being able to filter by type is an important piece of calendar functionality.

Proposed resolution

Add a default vocabulary. Probably don't add initial terms as they won't be generic enough. Terms can be added by a distro's install profile using hook_entity_insert().

Relevant tutorial: http://www.cmsquickstart.com/blog/style-event-calendar-drupal-7

Remaining tasks

No work done yet.

User interface changes

• Add exposed taxonomy term filter to calendar, ideally displayed via context as a sidebar block.

API changes

None.