Fix CMS content route

Comfy is generating the wrong content links when the CMS content is
mounted on /cms. We can just set the Site URL to /cms instead to get
the same content URLs.

@modsognir @jiannis
Add bower and package jsons
Remove ignore key from package.json
Update README.md
Edit page site prism object and preview cucumber feature.
Add list of categories
Point bower to latest CMS editor
Preview feature steps and support methods.
Add db/seeds.rb to seed categories
Add environment aware database seeding
Modify scenario to test for preview URL and target attribute instead.

Can’t find a way to open a new window with an external URL using poltergeist.
Add default hostname in db/seeds.rb
Add rich text snippet to test page content.
Publish feature.
Rename word converter model to word document.
[WIP] Upload word document, convert to markdown and populate editor.

@modsognir :eyes: