Feature/answer mvc

DO NOT MERGE
Please check.
.includes eager loads any associations. It speed up database loading massively in some instances.
http://guides.rubyonrails.org/active_record_querying.html#eager-loading-associations

I don't think it actually applies much here since we are only loading the answers of 1 user. But by using eager loading here, we are querying the database before the page load.