create failing unit test to demonstrate problem identified in issue #594
remove all the byteorder checks from fits.py, and move them into the Image constructor
(#594)
check for little-endian/big-endian mismatches in Image constructor
(#594)
note bug fix in CHANGELOG
(#594)
use nifty byteorder-swapper to simplify image constructor tests
(#594)
Merge pull request #595 from GalSim-developers/#594

#594 - Image bug fix for little/big-endian issues
improve SED mul & div unit tests to check on redshifted SEDs
(#596)
unit tests for SED withFlux, withFluxDensity, and withMagnitude for redshifted SEDs
(#596)
uncomment SED tests
(#596)
fix rest/obs frame SED transformation bug and forbid SED addition/subtraction for unequal redshifts
(#596)
add redshifts to more SED unit tests
(#596)
SED unit tests with and without redshifting
(#596)
Merge pull request #597 from GalSim-developers/#596

#596 SED.withFlux bug
Merge branch 'master' into #590