9/9 Make a multi-screen example with TTGO T5 mini 2.13 display w/ 3 buttons

[martinberlin]

This started since I wanted to make a mini-WiFi badge with the T5:
https://github.com/Xinyuan-LilyGO/T5-Ink-Screen-Series

So this is my very raw try to achieve it, in branch:
cale_t5

[martinberlin]

First version is done. Says 1,2,3 and CALE on the setup()

The idea to further develop is to send per JSON:

  {"day": 19, "month": 3}

And have the Calendar T5 spell if for you.

[martinberlin]

Done and published in branch:

cale_t5