Image upload infrastructure + profile image CRUD

Created the image upload infrastructure and image upload is supported for profile images. Events coming next!

**New crud:**

POST /api/me/profile_image?provider=FACEBOOK
  Sets the users image to their provider image. Default on creation.
or
POST /api/me/profile_image
  with an image as content for the POST request
  Sets the profile image to that content.

DELETE /api/me/profile_image
  deletes the profile image and leaves it cleared for the user.

DELETE /api/me
  auto deletes the profile image