Merge branch 'upgrade_paperclip'

upgrade paperclip dependency

add loading spinner on update

remove some font styles, add display block to form textareas

make page responsive

add separator widget

fix demo user login

remove a bunch of js files

convert pages index to erb

add show.json.jbuilder

use jbuilder for page "show" action

use jbuilder to include custom widget fields

fix image uploading

fix another react error

fix react error