m + do not any assumtion of int typedefs

Signed-off-by: Mattias Andrée <maandree@operamail.com>
if the system is awesome enough to have sigupdate defined, use it instead of sigusr1

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

Signed-off-by: Mattias Andrée <maandree@operamail.com>
doc protocol stuff except message passing related stuff

Signed-off-by: Mattias Andrée <maandree@operamail.com>
message id is unsigned 32-bit

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

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

Signed-off-by: Mattias Andrée <maandree@operamail.com>
info: message passign and interception

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