Piccolo IOT

Added to PiccoloP5 the option of stream piccolo commands over Http
instead of Serial, useful for sending piccolo commands from devices
that do not have usb or serial ports.
Added Android port of Control (work in progress)
Small fixes in Controllo.
Pre merge commit

Checking for breaking changes before  a push to release branch.
PiccoloLib updated to v0.81 , new bezier function minor tidying up.
PiccoloP5 updated to 0.91, code documentation added.