      """ Loads faces from a faces folder along with the face's hash.
  
      Examples
      --------
      Loading faces with their sha1 hash:
  
      >>> loader = FacesLoader('/path/to/faces/folder')
      >>> for filename, face, sha1_hash in loader.load():
      >>>     <do processing>
      """
 
</s> remove     >>> for filename, face, sha1_hash in loader.load():
 </s> add     >>> for filename, face, metadata in loader.load(): </s> remove     """ Loads faces from a faces folder along with the face's hash.
 </s> add     """ Loads faces from a faces folder along with the face's Faceswap metadata. </s> remove     >>> for filename, hash in read_image_hash_batch(image_filenames):
 </s> add     >>> for filename, meta in read_image_meta_batch(image_filenames): </s> remove     tuple: (`filename`, :func:`hashlib.hexdigest()` representation of the `sha1` hash of the image,
            [optional shape tuple] )
 </s> add     tuple
        (**filename** (`str`), **metadata** (`dict`) )
 </s> remove     >>> image_hash = read_image_hash(image_file)
 </s> add     >>> metadata = read_image_meta(image_file)
    >>> width = metadata["width]
    >>> height = metadata["height"]
    >>> faceswap_info = metadata["itxt"]
    Loading faces with their Faceswap metadata:
      """ Loads faces from a faces folder along with the face's hash.
  
      Examples
      --------
    Loading faces with their Faceswap metadata:
  
      >>> loader = FacesLoader('/path/to/faces/folder')
      >>> for filename, face, sha1_hash in loader.load():
      >>>     <do processing>
      """
keep keep keep keep replace keep keep keep keep keep
 Update extracted faces to use PNG EXIF data (#1123)

Documentation
  - Update Usage.md, align.rst and image.rst
lib.image.py
  - read_image - Remove hash return, add metadata return
  - Remove read_image_hash functions
  - Add read_image_meta functios
  - Replace encode_image_with_hash with encode_image (to store metadata)
  - Add png meta reading and writing functions
  - Update Image Loaders/Savers to handle metadata rather than hashes
lib.training_data
  - Naming updates to remove references to hashes
lib.align.Alignments
  - Add versioning notes
  - Increment alignments version to 2.1
  - Deprecate hashing lookup functions
  - Replace filter_hashes with filter_faces
lib.align.detected_face
  - DetectedFace
    - Remove hash property
    - Add png header data serializing/deserializing functions
  - Mask
    - Add png header data serializing/deserializing functions
  - add update_legacy_png_header function to update png meta data
lib.cli.args - Deprecate alignments files for training
- plugins.train.trainer
  - Update alignments/mask code to read png header data
- scripts.convert
  - Aligned images folder - read data from png headers
- scripts.extract
  - Write png header information and no longer store hash of face
- tools.alignments
  - remove leftover-faces, merge and update-hashes jobs
  - Update jobs to use png meta data rather than hashes
- tools.manual
  - Update extract code to output png meta data and don't store hashes
  - Perform check on launch that tool is not pointing at a faces folder
tools.mask
  - Update to use png meta data
tools.sort
  - Update to use png meta data 
lib/image.py