[2911] initial draft
Fleshing out Organizations and Groups spec

Adding more detail from my own thoughts, the pull request, and Ross's
Google Doc
Add a comment to Organizations and Groups spec
[2911] Answer seans questions in doc
Fix typos and wrapping in Groups and Organizations spec
Clarify that sysadmins can edit organization metadata

In Groups and Organizations spec
Add a little explanation of groups vs organizations

... at the top of the Groups and Organizations spec
Add a bit about groups vs tags to groups and organizations spec
Clarify groups 'orthogonal collaboration' in Groups & Orgs spec
renamed:    doc/oranization_group_auth.rst -> doc/organizations_and_groups.rst
[#2911] Add transition plans phase 1
[#2911] Updates to orgs doc
{#2911] Style fixes
[#2911] New tables
[#2939] Sysadmin field on user table and data migration of sysadmins
[#2939] Paster now uses new sysadmin model
[#2939] Logged in sysdmins can do anything
[#2939] Package table changes
[#2939] Add organization controller
[#2939] Organization routes added