adds rake task to recalculate all comment counts in proposals and comments

lib/tasks/comments.rake

@@ -0,0 +1,9 @@
+namespace :comments do
+
+  desc "Recalculates all the comment counters for debates and proposals"
+  task count: :environment do
+    Debate.all.pluck(:id).each{ |id| Debate.reset_counters(id, :comments) }
+    Proposal.all.pluck(:id).each{ |id| Proposal.reset_counters(id, :comments) }
+  end
+
+end