Update motiviation

Provides unique verbage that more closely fits the template.
Delete "short version"

This summarizes other text. Perhaps it is ultimately valuable, but if so I believe
we should add it as an amendment after we've come to agreement on the long form.
Shuffle around guidelines

Creates a separate section outlining unacceptable behavior.
Remove staff procedures

This is too heavily written around employees/staff rather than community leaders.
Perhaps a formal process is really necessary for an initial version of this, but
if we're going to lean on the Chef Software Community Team initially to handle
this we're probably best adding procedures as we work out the process for who should
handle complaints.
Update the focus of the incident handling process

The Chef Community Team can be the designated community advocates until we
establish a process and training for others to fill those roles.
Merge pull request #1 from btm/community_guidelines

Community guidelines