Update CHANGES & README for release (spacetelescope#296)

romancal release 0.4.1, Roman DMS Build 0.3

Roman DMS Build 0.2

Update Changes.rst and README.md for 0.3.1 release (spacetelescope#226)

* Resolve merge conflicts

* Added changelog.

* Update setup.cfg to match JWST warnings & error list and initial pass for code fixes. (spacetelescope#188)

* test change

* test change

* RCAL-131 Update pep8 rules in setup.cfg & update some code.

* JP-131 update Changes.rst

* test change

* test change

* RCAL-131 Update pep8 rules in setup.cfg & update some code.

* JP-131 update Changes.rst

* RCAL-131 Update test_dark_sub for pep8

* Added changelog.

* Update Changes.rst and README.md for 0.3.1 release

* Update Changes.rst for 0.3.1 release

Co-authored-by: PaulHuwe <[email protected]>

tagging for further development

romancal release 0.3.0

tagging for further development

tagging release 0.2.0

tagging for dev

tagging for release