Fix pagefault due to thread_yield

m8
Add ensure field to proc_ep

m8
Fix ps and kill

m8
Bring back spawning on remote core

m8
Refactor shell

m8
Bring back shell on slave core

m8
Cleanup xcore RPC interface

m8
Get rid of WAITING_*

m8
Refactor procman handlers

m8
Cleanup

m8
Improve error handling

m8
Add documentation

m8