small readability improvement in application policy
Added contribution policy
added after_action to verify if index is policy scoped
renamed only_admin to is_admin?
added Scope to contribution policy and migrated users/contributions_controller to pundit.
fixed %s/policy_scoped/policy_scope/ and %s/verify_scoped/verify_policy_scoped/
created different policy for create and new in contribution. Project must be online, so we can move old logic from controller into policy.
Migrate projects/contributions_controller to pundit
removed contribution authorizations
implemented permitted_attributes for contributions
fixed problem with request_refund and new policy
used UserScope instead of default Scope for contributions policy as this policy can be used in different contexts.
fixed contribution policy spec renaming scope
Merge pull request #561 from diogob/migrate_contributions_to_pundit

Migrate contributions to pundit