Cage Information into SafePOSIX

[rennergade]

This may be a longer term goal, and for now is set for after our current LAMP goals.

We currently keep most of our book keeping in each cage's nap structure. These include references and bookkeeping variables for the cages parent and children.

One hope is to eventually move all this information to SafePOSIX. Doing this could enable us to implement wait() in SafePOSIX, as well as move much of fork() and exec() besides the thread spawning necessities.

This pairs with the goal of moving sysem level id's to SafePOSIX (pid, uid, gid, etc..)