update gitignore

Signed-off-by: Mattias Andrée <maandree@operamail.com>
move texinfo file into directory info

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

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

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