Squashed 'fhdps_utils/' changes from 1c798a4..90f6901

90f6901 Bug fixes in healpix_quickimage to ensure images have right orientation and axes labels.

git-subtree-dir: fhdps_utils
git-subtree-split: 90f6901634355c68a1083da8e5bf1b5d57a9d018
merged changes from fhdps_utils