Extend docker swarm integration test to support RunCVM inside swarm V……M nodes

Document process for testing RunCVM within a RunCVM VM

Fix: correct integration test logging

Update README- Acknowledge changes in status of Docker/Kata compatibility  (#9)- Clarify current project aims and ambitions

Bugfix substituting APPEND array to kernel command line

Support for containers connected to multiple networks- In the container entrypoint:  - Itemise network interfaces and save their configuration  - Save any additional non-link-scope non-default routes    to support networks with multiple subnets  - Create a bridge to join each interface to a tap device in the VM  - Restore network and gateway routes via each bridge- In the VM:  - Identify each interface by MAC address and rename devices to match    the original configuration in the underlying container  - Restore device configuration and routes

Make 'preqemu' breakpoint more informative- The 'preqemu' breakpoint now prints the intended qemu launch command,  before dropping to a shell prompt