do not setup bridge ip if bridgeNetwork is nil. This is the case when
-b='none' bridge is provided.

issue #2768
https://bugzilla.redhat.com/show_bug.cgi?id=1032094
fix the nil pointer panic on closing a disabled network manager
Issue #2768
Merge pull request #2769 from vbatts/none_bridge

Do not setup bridge ip if 'none' bridge is provided
Reformatting parseRun and partParse
Use a constant for PortSpecTemplate + display the template in the CmdRun help
Format CmdRun
Merge pull request #2822 from dotcloud/better_port_help

Better port help
Remove goroutine leak. Make sure termcap are reset each time.
Make a validation on links name
Remove useless New*Opt functions, singleline Opt types
Merge pull request #2827 from dotcloud/2778-fix-shell-corrupt

2778 fix shell corrupt