Fixes issue with server shutdown.
Interface description support.
Bump version to alpha4.
Fixed VPCS base_script_file setting
Bump version to 1.0a5.dev1.
Updated vpcs to allow up to 512 interfaces to start
Fixes #41.
Added base64 transmission of script_file
Wait more time for ioucon thread to be completed. Prevent IOS to be
started or stopped if the status isn't right.
Merge pull request #12 from joebowen/master

Fixes for the VPCS path setting and base_script_file setting
UDP connection checks.
Catch exceptions in file upload handler.
Working VPCS implementation.
Fix issue with VPCS create request.
Use SIGTERM instead of SIGUSR1 to stop vpcs.
Clean delete for IOU & VPCS devices.
Amend device configs when renaming.
IOU layer 1 keepalive messages support.
Changes how to look for vpcs and iouyap locations.
Fix a potential issue in ioucon.