Update readme.md

2017-03-30 19:01:47 -10:00 · 2017-03-30 19:01:47 -10:00 · 2ee4c6dfa3
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--- a/keyboard/gherkin/pcb/readme.md
+++ b/keyboard/gherkin/pcb/readme.md
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+[How to order PCBs from gerber files](http://www.40percent.club/2017/03/ordering-pcb.html)
+
 EasyEDA ordering info:

 1.1