* Add specs for ArticleImageUploader
* Add specs for BadgeUploader
* Add specs for CoverImageUploader
* Add specs for ProfileImageUploader
* Refactor uploaders to inherit from BaseUploader
* Strip EXIF and GPS data from uploaded images
* Add ImageMagick to the docs
* Protect strip_exif
* Add system test to create article from the editor
* Move article creation from API to app controller
* Fix system test to edit posts
* Move article update from API to app controller
* Rewrite create article API using API key
* Add main_image and canonical_url to allowed creation params
* Rewrite update article API using API key
* Fix tests and have Comments API inherit from API