Add devflow files
Add devflow's update_version.py file
Add ci files
Change default XSEG-Archipelago Specs
Add Archipelago disk type
Introduce MAX_MERGE_SIZE variable

Cap maximum merge size to 512k.
Send close request to Volume Composer on close
Handle failed XSEG request on close
Add Pithos+ disk type
Remove filesize option from Pithos+ disk type

The driver automatically calculates the volume size.
Add README.md file
Refactor Archipelago block driver code

Remove useless Pithos block driver.
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
Make non-blocking xseg_receive() call
Introduce Archipelago mport/vport constants
Merge pull request #6 from cnanakos/develop

Make non-blocking xseg_receive() call