Lazy-load ActionView via ActiveSupport.on_load hook

Referencing ActionView::Base constant would kick :action_view load_hooks.
This should better not happen for Rails apps when loading bundled awesome_print gem.
Fix new ActiveRecord::Relation instance presentation for Rails>=4
Merge branch 'fix_activerecord_relation' of github.com:sponomarev/awesome_print
Merge branch 'lazyload_action_view' of github.com:amatsuda/awesome_print