fixes abilities: level 3 users can vote proposals, not just level 2

app/models/ability.rb

@@ -42,7 +42,7 @@ class Ability
         can :vote, Comment
       end
 
-      if user.level_two_verified?
+      if user.level_two_or_three_verified?
         can :vote, Proposal
       end
 

spec/models/ability_spec.rb

@@ -106,6 +106,12 @@ describe Ability do
 
       it { should be_able_to(:vote, Proposal) }
     end
+
+    describe "when level 3 verified" do
+      before{ user.update(verified_at: Time.now) }
+
+      it { should be_able_to(:vote, Proposal) }
+    end
   end
 
   describe "Organization" do