New: gr-authorcheck: search for inappropriate commits

Signed-off-by: Miroslav Safr <Miroslav.Safr@tieto.com>
New: gr-authorcheck case in/- sensitive search, better log output

Signed-off-by: Miroslav Safr <Miroslav.Safr@gmail.com>
Fix: don't show anything if does not find the matched commit
Fix: take name of script from basename

Signed-off-by: Miroslav Safr <Miroslav.Safr@gmail.com>
New: counting added

Signed-off-by: Miroslav Safr <Miroslav.Safr@tieto.com>
Fix:git logs pretty=tformat to avoid problems with empty logs

Signed-off-by: Miroslav Safr <Miroslav.Safr@gmail.com>