Offset edges along a plane How do you offset a series of edges evenly, looped or not?
Searching on line I came across 
http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Modeling/offset_edges which seems to be what I'm looking for but I can not get it to work using Blender v2.75.  Does something have to be done to activate this?  When I highlight an edge loop and hit Ctrl-E the pop-up menu does not include an 'Offset Edge' submenu.

I see this question has been asked before but the answers seem to refer to files that are no longer available.
I'm using 2.76 And it all works just fine. Here are the steps:
You need to install the addon

Download the Add-on from the link in this page: https://github.com/Bombaba/BlenderPythonScripts/blob/master/mesh_offset_edges.py



To install the Add-on in Blender:
Press Ctrl Alt U to open the User Preferences window. Go to the Add-ons Tab and press on Install from File:



Select the file you had downloaded earlier and click on istall from file

Back on the User preferences window find the Mesh section and enable Mesh:Offset Edges by clicking on the box on the right.
To make the add-on permanent on your blender installation press the Save User Settings button.

The add-on is now available and ready for use.

Select the object you want to work on and enter edit mode (Tab)

Select the edges you want to affect and press Ctrl E. The offset Edges option should be available in the Edges Menu.




The options for the tool will be displayed on the Toolshelf (T) or by pressing F^