0.16.0

Added

• walterbm: Add support for thumbnail image resizing.
• DCjanus: add methods get_image_alpha_channel, draw_image, set_image_channel_mask,
  evaluate_image, border_image, shadow_image, import_image_pixels, set_first_iterator,
  next_image
• DCjanus: feat: std error compatible error
• davidwilemski: add binding for MagickStripImage()