Use HTTP DELETE to delete an image

[niko]

As far as I've seen images are deleted by a GET-Request to /admin?md5=12345&t=1.

Best practice IMHO would be to

• Never be destructive on GET requests.
• Use DELETE requests for deletes.
• Use POST requests with a parameter action=delete to trigger a delete from a webbrowser form.

I would suggest to:

• Introduce DELETE A.S.A.P to delete images.
• Depricate deletion by GET request.
• Remove deletion by GET requests in version 4.0.

[buaazp]

Yes, it is a bad for deleting images through GET method. All the api will be refactored and under RESTful style in the next version~