Spectral Python 0.17

New Features

• Functions map_class_ids and map_classes were added for mapping class
  indices between images.
• view_nd now accepts custom axis labels.
• ImageArray and SpyFile have asarray method that provides numpy
  array interface.

Changes

• ENVI header parameter names are case insensitive (converted to lower-case
  after being read).
• ImageArray objects have additional SpyFile methods/attributes and
  indexing behavior is now like SpyFile's.
• An exception is now raised when attempting to open or save an image in
  ENVI format with nonzero major or minor frame offsets (see issue #35).

Bug Fixes

• [Issue #27] ImageView.str failed if image did not have "bands" in
  metadata.