bug#26138: website: Lepton-EDA is using Guile

[Peter TB Brett]

Lepton EDA is a suite of electronics CAD tools that relies heavily on 
Guile as an extension language, and increasingly for some core 
functionality, such as the netlisting layer.  It would be great to get a 
mention on the Guile website as a project that uses Guile!

Lepton EDA can be found at https://github.com/lepton-eda/ (we haven't 
got a proper website or domain name set up yet; I'll update this bug 
report if/when we do).

Please let me know if you need more details about Lepton :)