UI improvements + Python 3 & Raspi 3/4

Poppy Ergo Jr 3.0.0 for Raspberry Pi 3 and Raspberry Pi 4 has now full support of Python 3 and Raspi4, it runs Python 3.7, Snap 5.4.5. It also features: a motion recorder, a Wifi hotspot, an integrated 3D simulator, a full Python 3 support, easier information messages, simpler API start-and-stop for Snap, a Poppy desktop on the HDMI monitor…

This archive is zipped in 7z format, unzip it before flashing it. See the howto in order to flash your SD card with the new software image.

MD5 sums:

ef53d21ef7ddc2a225e3f1c7c0b9874b  2020-10-23-poppy-ergo-jr.img
f86b74f3453ee68dc0c99b2327e229f6  2020-10-23-poppy-ergo-jr.img.7z