tools/verifygitlog.py: Add script for verifying commit message format.
tools/verifygitlog.py: Add script for verifying commit message format.

The main rules enforced are:
- At most 72 characters in the subject line, with a ": " in it.
- At most 75 characters per line in the body.
- No "noreply" email addresses.

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython