Change relationship of events and organizations to has_and_belongs_to_many
Add org_administrators join table
Add corresponding relationship to user
Allow user to attach an organization to an event. Closes #93
Fix tests
Merge pull request #104 from southpolesteve/add_org_to_event

Allow user to attach an organization to an event. Closes #93
Merge branch 'master' into many_orgs
Delete test
Merge pull request #107 from southpolesteve/many_orgs

Change relationship of events and organizations
Try and fix test