continue to test cfs if rt is not enabled in kernel
check for vlan dependency
wait until sshd has started on each host
promote waitListening to util.py
fix popen to work with shell
Merge branch 'master' of github.com:mininet/mininet into patches/fix_sshd

Conflicts:
	examples/cpu.py
remove User Switch from linearBandwidth due to poor performance
add 1ms delay to all links to exaggerate TCP bandwidth decrease across an increasing number of links
Install vconfig in VM for VLAN example

This should help with #393 although it doesn't solve
the root issue of the example failing silently when
vconfig is missing.
Merge pull request #394 from cdburkard/patches/cpu_test

continue to test cfs if rt is not enabled in kernel
Merge pull request #395 from cdburkard/patches/vlan_fail_output

check for vlan dependency
Merge branch 'patches/fix_sshd' of https://github.com/cdburkard/mininet into cdburkard-patches/fix_sshd
Merge branch 'cdburkard-patches/fix_sshd'
Merge branch 'patches/linear_bw' of https://github.com/cdburkard/mininet into cdburkard-patches/linear_bw
Merge branch 'cdburkard-patches/linear_bw'