records participation of user via web

answering a poll question creates a voter with the user data to record
participation in question’s poll

app/controllers/polls/questions_controller.rb

@@ -19,6 +19,7 @@ class Polls::QuestionsController < ApplicationController
 
     answer.answer = params[:answer]
     answer.save!
+    answer.record_voter_participation
 
     @answers_by_question_id = {@question.id => params[:answer]}
   end