How to install Sensei theme I've only just discovered Blender and after a few hours I can do far more of my simple project than I managed with FreeCAD after hours of struggle. 

However I have found the scaling and units a bit confusing and read that Sensei deals with this more simply. I downloaded the zip file and tried running it from the Linux terminal and in the Blender Python console but it errors.

Blender 2.76 on Linux Mint Cinnamon 18.1
Thanks to Duarte Farrahota Ramos for the answer.

Instructions and file to download are here: Sensei 


Download the file sensei_theme_update_10_21_2013.zip
Extract the zip file.
Open Blender and go to “File” at the top choose “User Preferences” and then choose the tab “Themes”
At the bottom of that screen choose “Install Theme” and select the file you just downloaded on your computer.
If you’re happy with the theme changes then go to “File” at the top and select “Save Startup File” and you’re done.


Notes:
(2) Make sure the extract results in an .XML file. 
(5) This doesn't appear to be necessary.