Update README.md
Fix specs for rspec 3.
Re-enable should syntax to remove warnings.
Merge pull request #3 from smennetrier/wifiDevice

Add wifi device support
Merge branch 'master' of github.com:bsingr/networkmanager-dbus
Update README.md
Fix dbus mistake

This patch fix issue 4 :
https://github.com/bsingr/networkmanager-dbus/issues/4