Introduce new request submission function

Remove archipelago_aio_read/write functions and use simpler
__archipelago_submit_request one.
Add archipelago v0 support
Remove obsolete XF_CONTADDR flag
Wait XSEG request handler exit

Wait XSEG request handler exit and destroy
thread condition variables and mutexes.
Simplify and refactor tdarchipelago_finish_aiocb().
Check Archipelago request state, fail it if not served.
Add Archipelago shared memory segment name in options list