Migrate FoundOrganisationProposals to FoundAssociationProposals. Closes #475.
Disable X-Sendfile for now, to guarantee working file downloads.
Terminate a Director's current Officership when their Directorship ends.
Calcuate director retirement correctly for AGMs after the first one.
Fix layout of resolution forms on meeting minuting page.
Add missing Resolution subclasses to observer pre-loading.
Add Directorship#ended?.
Don't show voting information for a proposal where voting hasn't started yet.
Feature: Terminating a directorship by ordinary resolution.
Re-enable X-Sendfile support, as configuration issues have been fixed.

See #477 for details of server configuration.
Upgrade delayed_job_active_record to 4.0.1.
Upgrade rdiscount to 2.1.7.1.
Add 'add all members' button to meeting minuting.
Include Administrator creation in the app setup process. Closes #480.
Add Organisation#constitution_clause_names.
Add Constitution#updated_at.
Don't output leading zeroes when using the Time format `:long_date`.
Fix code indentation.
Simplify email look-up logic in step definition.
Make step definition for Association founding more lifelike.

This now creates all the records and history that you would get
from users actually creating and founding an Association.