improve startup performance, largely by removing unnecessary ifconfigs

fixes #347

Adding NAT class to NodeLib

Raise exception when link incorrectly formatted

fix for controller shutdown - send SIGHUP rather than SIGKILL

Update to MiniEdit 2.2.0.1

- Replace custom code to set OF protocols with new Mininet available API to set.

Add parameter to set protocol list in OVSSwitch.

- Updated for new Mininet 2.2.0
- Support TCP or SSL for remote controller
- Support HostWithPrivateDirs Hosts

Applying @cdburkard fix to #322

fix Singleton.__call__ error

Applying @cdburkard fix to #322

Includes some big fixes and new feature to run user defined command during
node start and stop.

Conflicts:
	mininet/net.py
	mininet/node.py

fix Singleton.__call__ error

Clean up standard topologies to use build

fix Singleton.__call__ error