Community guidelines

This is an initial draft.  It's not complete but is far enough along that it's ready for more eyes and comments.
** Who should incidents be reported to? **

We need to define a community manager role within the community.  There may be venue-speicific managers such as channel operators in IRC and there should always be one overall manager.  Perhaps best to use a process similar to the [process for becoming an editor of the Chef RFC repository](https://github.com/opscode/chef-rfc/blob/master/rfc000-rfc-process.md#roles).  This would allow us to separate the role completely from Chef, the company.  Appropriate contact info for each manager should be included in the guidelines at all times.  Contact info may be venue-specific.  For example, you should only need to know the IRC nick of a channel operator / IRC community manager.