image arithmetic overhaul: add, sub, mult, div, and in-place versions
(#419)
image arithmetic overhaul: and, or, xor
(#419)
added Image pow, ipow functions
(#419)
put changes into log
(#419)
fixed decision for when to test for image consistency
(#419)
don't check for bounds consistency as long as shape is same
(#419)
fixed criterion for testing scales/dimensions
(#419)
fixed part of correlatednoise.py that did not require equal image scales when adding images
(#419)
added test for exception handling in image addition
(#419)
Image pow only for float types
(#419)
unit tests for image pow
(#419)
documentation on artifacts for draw() method, in response to #424
more clarification regarding wmult
more wmult clarification (#424)
further wmult clarification, thanks to dkirkby (#424).
Merge branch 'master' into #419
temporarily commented out failing test
(#419)
more accurate statement of changes in CHANGELOG
(#419)
Working version of image addition ValueError tests
(#419)
removed defunct warning about test that now works thanks to msimet
(#419)