Front page: create a new taxonomy for items to be displayed in different sections on the front page

[djulin]

The V2 front page is organized in several broad sections: Sunday Meetings, Upcoming (general) Events, What's New, Forums and Workshops, At the Cafe, Videos.

Some of these could be filtered based on the "event group" on the NYSEC_Date_Event content type. However, this is not sufficient because:

• The current list of values for "event group" does not include values for categories like the Cafe, etc. and it is not possible to add new values once some nodes have been created in the DB
• Not every entry that we want to show on the front page is an event with an associated time (e.g. main entries for Leader's Blog, etc.)

A more flexible approach is to use a new taxonomy vocabulary field, to which we can add new terms over time, and that we add to several content types besided NYSEC_Date_Event.

See #69 for a more complete discussion of the necessary design and architecture

[djulin]

Created the field "field_v2front_category" and added that field to the following content types:

• NYSEC Date Event
• Page
• Story
• Photo Gallery