Add STEREO HI colour maps and a HIMap class.
add EOF return

also typo
Merge pull request #1170 from Cadair/stereo_HI

[Review]: Add STEREO HI colour maps and a HIMap class.
Add changelog entry.
Merge pull request #1174 from Cadair/stereo_HI

Add changelog entry for STEREO
Merge remote-tracking branch 'upstream/master' into cubes