added default controller class
fixed command parameter
set DefaultController as the mininet class default
Don't remove items from a list we're iterating over
Add utopic/Ubuntu 14.10
add connected() to LinuxBridge
Added TorusTopo, a 2D torus topology
Tolerate passing controller *objects* into Mininet()
Hack to avoid failing version check... ;-/
restructured defaultController into a function
revised comment on defaultController function
removed bookmark
Check for Controller type using isinstance()
Merge branch 'devel/defaultController' of https://github.com/cdburkard/mininet into cdburkard-devel/defaultController

Conflicts:
	bin/mn
	mininet/net.py
Merge branch 'cdburkard-devel/defaultController'