use json.h instead of json/json.h
use json.h instead of json/json.h

the include directory should be added by configure script

eworm-de/yubikey-personalization,dmitriykuptsov/yubikey-personalization,Yubico/yubikey-personalization-dpkg,dmitriykuptsov/yubikey-personalization,dmitriykuptsov/yubikey-personalization,Yubico/yubikey-personalization,Yubico/yubikey-personalization,Yubico/yubikey-personalization-dpkg,eworm-de/yubikey-personalization,Yubico/yubikey-personalization-dpkg,eworm-de/yubikey-personalization