Release v1.4
Highlights:
- async mode automatically starts VELOC backend if not already running, which brings two advantages:
- can generate the VELOC config file dynamically at runtime before calling VELOC_Init
- no need to do extra scripting to start the VELOC backend on each node
- VELOC backend starts as a daemon and logs by default into /dev/shm/veloc-backend-$HOSTNAME-$UID.log