GitLab

- adds description for netperf experiment
- reformat local.py
- reformat results/netperf.py

moved functions:
- create_basic_hosts()
- create_multinic_hosts()
- create_dctcp_hosts()

This speeds up base image build significantly

For largescale experiment we otherwise run out of IPs

Includes an new DistributedExperiment class, a runner for distributed
experiments, a basic sequential runtime, and an example experiment
"dist_netperf" (although scaling beyond 2 hosts is currently still
broken in the rdma proxy).