make it compile (without warnings in gnu) on haiku

Signed-off-by: Mattias Andrée <maandree@operamail.com>
licence stuff

Signed-off-by: Mattias Andrée <maandree@operamail.com>
style

Signed-off-by: Mattias Andrée <maandree@operamail.com>
improve gitignore

Signed-off-by: Mattias Andrée <maandree@operamail.com>
make improvement

Signed-off-by: Mattias Andrée <maandree@operamail.com>
install license

Signed-off-by: Mattias Andrée <maandree@operamail.com>