Groups integrations updates for pandeia/pandexo v1.4#365

Draft

bourque wants to merge 20 commits intoExoCTK:developfrom

bourque:groups-integrations-1.4-updates

Commits on May 14, 2020

Updated groups_integrations form to include updated filters/subarrays for NIRCam and NIRSpec
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Initial commit of unit tests for groups & integrations calculator
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Minor update to appease @pep8speaks
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Commits on May 15, 2020

Removed option for SUBTASOSS BRIGHT
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Commits on May 18, 2020

Commits on May 22, 2020

Merge branch 'master' of github.com:ExoCTK/exoctk into groups-integrations-1.4-updates
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Commits on May 28, 2020

Commits on Jul 30, 2020

Updates to NIRSpec/Prism mode, which now has results that reflect the usage of the s1600a1 aperture.
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Commits on Sep 8, 2020

Commits on Oct 9, 2020

Commits on Oct 13, 2020

Removed support for NIRSpec PRISM mode, as it is still not well tested or understood
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