[#65315292] create join table badges_users
[#65315292] add grant_badges method in Reward's after_create
[#65315292] fix blueprints
Merge branch 'master' of https://github.com/meurio/meurio

Conflicts:
	app/models/reward.rb
	spec/models/reward_spec.rb
	spec/support/blueprints.rb