ifstatus: Do not check for config files
fsm: Update client-state on DEVICE_READY and DEVICE_UP
fsm: Do not fail when slave/port is missing
fsm: address acquire signal handling cleanup
ifconfig: keep lease in failed state on request failure

When requestLease fails or we loose a lease because dhcp
rebind failed, keep the lease in failed state instead to
remove it completely to allow ifstatus to consider it.
Merge pull request #389 from pwieczorkiewicz/ifstatus-no-config

Fixes to status display and configuration
Merge pull request #391 from mtomaschewski/status-eval-2

fsm: address acquire signal handling cleanup
Merge pull request #392 from mtomaschewski/status-eval-3

ifconfig: keep lease in failed state on request failure
fsm: ignore (previous) address releases in acquire
Merge pull request #393 from mtomaschewski/release-on-acquire

fsm: ignore (previous) address releases in acquire
version 0.6.3