effectflag: split effect flag meta
Split effect flag meta into 3 separate flags:
- USERCHANGED
- DATECHANGED
- BRANCHCHANGED
Also display them separately for the moment, they could be grouped back
together if we want later.
syntax: re
/figures/[^/]+\.png$
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
\.err$
^tests/easy_run.sh$
^build/
^dist/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$
tests/\.testtimes