Dev

[abhiabhi94]

Add option for editor group to add posts outside of the admin

• Their published, queued and drafts are shown on my-posts page
• Superusers can update and publish their posts without entering admin

Add options on the admin page

• More filters added
• More actions added

Ckeditor

• Added youtube plugin support
• Group editor can add images now, view their previous upload images on the server

Post form

• Beautified using crispy form tags

Error handling

• Each view is protected by a decorator that allows only the expected request methods. Other methods will return an error 405
• PermissionDenied exception is added whenever permission is not sufficient.

Changed URL pattern for the author's posts

• It is now

  ../author/<str:username>

• This is done to accommodate the URL pattern for users where they can view their articles under the state draft, queued and published.

This resolves #123 #120 #126