v1.10.0

Added

• Added n_jobs and chunksize arguments to MuminDataset, to enable customisation
  of these.

Changed

• Lowered the default value of chunksize from 50 to 10, which also lowers the memory
  requirements when processing articles and images, as fewer of these are kept in
  memory at a time.
• Now stores all images as uint8 NumPy arrays rather than int64, reducing memory
  usage of images significantly.