Update to Ember 1.9.1
Update to Ember Pouch 1.1.5
Rename people to entities

Preparation for pseudo-polymorphic relationships. Subscribers,
contributors, institutions, and retailers are all entities.
Fold in retailers as a pseudo-subtype of entities
Componentise entity list items
Correct missed radio button value binding
Distinguish institutions from other entities
Extract entity search component
Wait for processing to complete before teardown

Fixes an intermittent test failure
Ignore case in entity search
Fix entity bullets in fulfillment lists
Use entity search for adding feature contributors
Add placeholder text to entity search
Differentiate retailers with bullet icon
Add icon for missing entities
Support deleting contributions
Add high-level test helpers
Add retail subscriptions
Correct manage retailers tests
Correctly set 6-issue subscription costs