Fix _BASE variables to be the top-level working copy directory
Merge pull request #1156 from scwhitehouse/rose-stem-base-fix

rose stem: ensure `_BASE` variables are working copy tops
Update CHANGES.md
rose_ana: cumf: read output by lines

Also fix style problems to improve pylint score.
Merge pull request #1159 from matthewrmshin/fix-cumf-memory

rose_ana: cumf: read output by lines