[PHID] Added some hints for further optional implementations
[PHID] Added some hints for further optional implementations

tomkrus007/Arduino,bsmr-arduino/Arduino,eggfly/arduino,eggfly/arduino,stevemayhew/Arduino,vbextreme/Arduino,henningpohl/Arduino,henningpohl/Arduino,PaoloP74/Arduino,vbextreme/Arduino,nandojve/Arduino,stevemayhew/Arduino,vbextreme/Arduino,stickbreaker/Arduino,nandojve/Arduino,nandojve/Arduino,bsmr-arduino/Arduino,byran/Arduino,vbextreme/Arduino,majenkotech/Arduino,Chris--A/Arduino,bsmr-arduino/Arduino,bsmr-arduino/Arduino,stevemayhew/Arduino,eggfly/arduino,stevemayhew/Arduino,me-no-dev/Arduino-1,tbowmo/Arduino,vbextreme/Arduino,acosinwork/Arduino,Chris--A/Arduino,niggor/Arduino_cc,xxxajk/Arduino-1,niggor/Arduino_cc,acosinwork/Arduino,vbextreme/Arduino,stickbreaker/Arduino,eggfly/arduino,henningpohl/Arduino,henningpohl/Arduino,NicoHood/Arduino,xxxajk/Arduino-1,NicoHood/Arduino,xxxajk/Arduino-1,vbextreme/Arduino,tbowmo/Arduino,xxxajk/Arduino-1,xxxajk/Arduino-1,henningpohl/Arduino,bsmr-arduino/Arduino,stevemayhew/Arduino,byran/Arduino,xxxajk/Arduino-1,stevemayhew/Arduino,me-no-dev/Arduino-1,acosinwork/Arduino,niggor/Arduino_cc,NicoHood/Arduino,stickbreaker/Arduino,majenkotech/Arduino,Chris--A/Arduino,niggor/Arduino_cc,eggfly/arduino,nandojve/Arduino,xxxajk/Arduino-1,NicoHood/Arduino,NicoHood/Arduino,acosinwork/Arduino,Chris--A/Arduino,stickbreaker/Arduino,bsmr-arduino/Arduino,byran/Arduino,tbowmo/Arduino,niggor/Arduino_cc,nandojve/Arduino,acosinwork/Arduino,byran/Arduino,tomkrus007/Arduino,nandojve/Arduino,majenkotech/Arduino,byran/Arduino,byran/Arduino,tomkrus007/Arduino,PaoloP74/Arduino,Chris--A/Arduino,niggor/Arduino_cc,majenkotech/Arduino,nandojve/Arduino,NicoHood/Arduino,stevemayhew/Arduino,tbowmo/Arduino,nandojve/Arduino,majenkotech/Arduino,niggor/Arduino_cc,me-no-dev/Arduino-1,acosinwork/Arduino,tomkrus007/Arduino,bsmr-arduino/Arduino,eggfly/arduino,tomkrus007/Arduino,niggor/Arduino_cc,eggfly/arduino,niggor/Arduino_cc,me-no-dev/Arduino-1,stickbreaker/Arduino,tomkrus007/Arduino,PaoloP74/Arduino,tbowmo/Arduino,vbextreme/Arduino,byran/Arduino,NicoHood/Arduino,acosinwork/Arduino,majenkotech/Arduino,me-no-dev/Arduino-1,tomkrus007/Arduino,me-no-dev/Arduino-1,NicoHood/Arduino,acosinwork/Arduino,PaoloP74/Arduino,stickbreaker/Arduino,tbowmo/Arduino,henningpohl/Arduino,byran/Arduino,Chris--A/Arduino,bsmr-arduino/Arduino,xxxajk/Arduino-1,PaoloP74/Arduino,PaoloP74/Arduino,Chris--A/Arduino,PaoloP74/Arduino,PaoloP74/Arduino,tomkrus007/Arduino,stevemayhew/Arduino,stickbreaker/Arduino,henningpohl/Arduino,eggfly/arduino,tbowmo/Arduino,me-no-dev/Arduino-1,henningpohl/Arduino,majenkotech/Arduino,tbowmo/Arduino,me-no-dev/Arduino-1,Chris--A/Arduino