Expand Region Translator

[jsub1]

This PR adds support for translating more ROI subsets, non-ROI subsets, and compound subsets into astropy regions.

[codecov[bot]]

Codecov Report

Merging #8 into master will increase coverage by 0.62%. The diff coverage is 98.79%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
+ Coverage   97.54%   98.17%   +0.62%     
==========================================
  Files          13       13              
  Lines         571      877     +306     
==========================================
+ Hits          557      861     +304     
- Misses         14       16       +2

Impacted Files	Coverage Δ
glue_astronomy/translators/tests/test_regions.py	100% <100%> (ø)	:arrow_up:
glue_astronomy/translators/regions.py	94.59% <95.6%> (+16.81%)	:arrow_up:
glue_astronomy/translators/tests/test_ccddata.py	97.67% <0%> (-2.33%)	:arrow_down:
glue_astronomy/spectral_coordinates.py	93.33% <0%> (-0.42%)	:arrow_down:
..._astronomy/translators/tests/test_spectral_cube.py	100% <0%> (ø)	:arrow_up:
...lue_astronomy/translators/tests/test_spectrum1d.py	100% <0%> (ø)	:arrow_up:
glue_astronomy/translators/ccddata.py	100% <0%> (ø)	:arrow_up:
glue_astronomy/translators/spectrum1d.py	100% <0%> (ø)	:arrow_up:
glue_astronomy/translators/spectral_cube.py	100% <0%> (ø)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 64fac15...5055119. Read the comment docs.

[jsub1]

Force push was to re-trigger tests after #9