Remove can? from update and credits views
Update dropzone gem version
Create Image model
Create images controllers
Create images#new page
Add translations for images#new page
Create JS to upload images with dropzone
Create modal on markItUp to upload images
Create new design for markdown editor
Remove test route
Create controller for markdown previewer
Create markdown/previewer#show page
Create JS to manage markdown previewer
Only add initjs partial tag if the request is xhr
Fix close button on markdown previewer modal
Add placeholder image to images#new page
Remove markitup images
Add content image uploader
Use medium image from content image upploader
Use path instead of url on editor JS