remove unnecessary log.h file

While being a bit too tired I added rubbish to git.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
move various definitions to a header file

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
use definitions in header rather than literal magic strings

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
ignore gnulib/ directory

Signed-off-by: Sami Kerola <kerolasa@iki.fi>