improve makefile

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

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

Signed-off-by: Mattias Andrée <maandree@operamail.com>
how could I forget the copyright notice

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