A GitHub repository has been set up:

https://github.com/sonomadude/Particle_Photon_Wallswitch

Two files were uploaded. The prototype schematic .jpg details the design of the Switch Mode Power Supply, and the Particle Photon, Cap Touch Switch and relay control circuitry. The .pdf parts list comes complete with all parts, cost estimates using DigiKey and other suppliers, with links to the suppliers of all parts.