api basics

Signed-off-by: Mattias Andrée <maandree@operamail.com>
on GAMMA_METHOD_MAX and GAMMA_METHOD_COUNT

Signed-off-by: Mattias Andrée <maandree@operamail.com>
change doc style to one appropriate for manuals

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