Compatibility with Ghost 1.x

[szelpe]

• The name in package.json file is now in lowercase
• {{pageUrl}} changed to {{page_url}}
• {{author.image}} changed to {{author.profile_image}}
• {{@blog.cover}} changed to {{@blog.cover_image}}
• {{id}} changed to {{comment_id}}
• {{meta_description}} removed from HTML head

[szelpe]

I've made the changes in the src folder, running grunt should copy the changes and create a new release.

[oswaldoacauan]

Closed in favor of #187