Creating router class
added static routing
Shortest path for static routing
Debugging for router.py
Creating router class
added static routing
Shortest path for static routing
Debugging for router.py
Debugging for static routing
Merge branch 'router' of https://github.com/kexinrong/NetworkSimulator into router

Conflicts:
	router.py
[Output] Enable realtime graph
Merge branch 'master' into Router

Conflicts:
	env.py
Merge branch 'router'