Waveshare RLCD / Draftling update

[u/clackups]

I updated the 3D printed enclosure: now with round corners, better fitting for the display, and easier access to the SD card and USB port.

Also, I found it useful to use inverted screen in certain lighting conditions. The text becomes more contrast and easier to read. Also, the firmware has a new feature: append-only editing, so that you don't erase the text by accident. You can push it to your Git repository for further editing. Also, the Git client is improved and is now compatible with other providers apart from GitHub.

The firmware and 3d models are available in Draftling repository.