v0.5

This is a major release recommended for all users. Your existing code to
open files may need to be edited slightly -- see the first change
listed below.

• API: all readers do not support the keyword arguments
  process_func, dtype and as_grey anymore. Please consult the
  documentation on Pipelines on how to convert videos. (PR 250)
• New built-in as_grey pipeline for convenient conversion to
  greyscale (PR 305)
• New built-in crop pipeline for making a cropped sequence (PR 247)
• Major speedup for random access in PyAVReaderIndexed (PR 340)
• Bumped Bioformats version to 6.5.x (PR 301)
• Added instructions for installing/updating Bioformats (PR 346)
• Enhanced support for metadata in the CINE format (PR 317)
• Enhanced documentation for PyAV video support (PR 334)
• Added multidimensional capabilities to ImageIOReader (see
  "multidimensional" documentation) (PR 320)
• Added support for nd2reader as alternative reader for Nikon nd2
  files (PR 272)
• Removed fallback to scipy.misc.imread, which was removed from scipy
  (PR 359)
• Fixed compatibility with PyAV 0.4.0 and newer (PR 300)
• Fixed compatibility and bugs in PyAV export (PR 283, PR 313)
• Fixed opening of PyAV videos with audio (PR 322)
• Fixed compatibility with newer versions of tifffile (PR 314, PR 339)
• Fixed response to missing ImageIO (PR 333)