Add support for eHomeDIY devices.

[user890104]

We have created a few dozens of devices, released as open-source hardware and
published the schematics to GitHub. We're planning to organize some small
(10-15 people) workshops on how to assemble, flash and configure these board.

https://github.com/eHomeDIY

[mcspr]

Thanks!
I guess I should also mention the link in the changelog

[user890104]

Can we add the devices to README.md in Custom & Development boards? We can provide hi-res pictures on a white background.
For https://github.com/xoseperez/espurna/wiki/Hardware I guess we can submit a change and make a wiki page, following the format of the other devices.

[mcspr]

Yes, of course.

Images could be added right in the repo with Readme changes, Wiki markdown can reference things through ../raw/dev/images/devices/ in url
(for example, see https://github.com/xoseperez/espurna/wiki/Hardware-JINVOO-VALVE-SM-AW713)