Note SCLCheck in README
Note pytest build dependency
SCLCheck: flake8 cleanups
SCLCheck: info message fixes
disallow /var/run and /var/lock

Distros moved to having /var/run and /var/lock as symlinks to /run resp
/run/lock. Therefore packages must no longer put files there at all.

Also, refactor the code for dir-or-file-in-* and make it configurable.
flake8 cleanups
Clean up test dir structure
Fix dist target, fallout from previous change
Release 1.6