Add instructions about Pico on README.
Add instructions about Pico on README.

- add install and run instructions on README.

PhrozenByte/Pico,dav-m85/Pico,wwwpro/sample,fabianacero/fabianacerog,ICPC-TUM/website,wwwpro/sample,electricant/faberlibertatis.org,PhrozenByte/Pico,bytespider/Pico,picocms/Pico,ondrejd/Pico,dav-m85/Pico,fabianacero/fabianacerog,dav-m85/Pico,hazulifidastian/efha.web,electricant/faberlibertatis.org,TakamiChie/Pico,PhrozenByte/Pico,StyxOfDynamite/Pico,smcdougall/Pico,lukasz-jakub-adamczuk/tech-jump-guide,ICPC-TUM/website,ondrejd/Pico,holg/Pico,xetryj/Pico,juffee/me,StyxOfDynamite/Pico,holg/Pico,TakamiChie/Pico,hazulifidastian/hazulifidastian-pico,fabianacero/fabianacerog,hazulifidastian/efha.web,ICPC-TUM/website,mors-es/Pico,johnnywon/Pico-Speed,mors-es/Pico,holg/Pico,xetryj/Pico,hazulifidastian/hazulifidastian-pico,smcdougall/Pico,johnnywon/Pico-Speed,electricant/faberlibertatis.org,theshka/Pico,juffee/me,lukasz-jakub-adamczuk/tech-jump-guide,lukasz-jakub-adamczuk/tech-jump-guide,theshka/Pico,picocms/Pico,TakamiChie/Pico,smcdougall/Pico,picocms/Pico,holg/Pico,ICPC-TUM/website,bytespider/Pico,ondrejd/Pico,theshka/Pico,TakamiChie/Pico