Renamed trigger.
Migration for all missing updatedAt values.

It seems only users collection is having them, but still, migration is
applied to all collections having updatedAt field.
Revert "Renamed trigger."

This reverts commit dfa3a1961eed61144b09b2e380dcfebffb800ebd.

Conflicts:
lib/documents/accounts.coffee
Merge branch 'development' of github.com:peerlibrary/peerlibrary into development
Fixed link to contributing.
Major update to terms of use and privacy policy.
Upgraded Kadira dependency.
Added lastActivity field to entities. Fixes #476
Updated migrations.
Merge branch 'development' into index-views

Conflicts:
	client/css/main.styl
	client/templates/privacy.html
	client/templates/terms.html
	lib/documents/annotation.coffee
	lib/documents/publication.coffee