begin on info + add makefile

Signed-off-by: Mattias Andrée <maandree@operamail.com>
info: overview and invocation overview

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

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

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

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

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

Signed-off-by: Mattias Andrée <maandree@operamail.com>
info: m + rendezvous

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