assorted updates and clarifications in demo comments
clarify documentation re: pixel conventions for centroids from adaptive moments
typos
(#461)
Fix bug in Image::resize
(#461)
Add unit tests of image.resize function
(#461)
Fix error in image.resize unit test.
(#461)
put image resize fix into CHANGELOG
(#461)
Merge pull request #463 from GalSim-developers/#461

#461 Fix bug in Image class resize function
merged in master, fixed conflict in CHANGELOG (minor)
(#460)