Better set of supported characters for 7 Segment LEDs

[Sebastian Möbius]

we discovered that there is a number of characters that can be displayed on a 7 segment display but are not yet supported.

Add these characters.

Supported Characters

1234567890
ABCDEFGHIJ L NOPQRSTU  YZ
abcdefghij l nopqrstu  yz
{}[].-_|\/

Not supported characters

KMVWX
kmvwx

‌

[Sebastian Möbius]

Fixed #226 - added more characters for the LED 7 Segments

→ <<cset 36dd948c4806>>