e-paper GDE021A1 display

here is the code provided as module, after some tests with the 3-wire SPI mode i will write the module.md documentation and create a pull request

major changes

1. uses Graphics.createArrayBuffer, without the need for an extra
   buffer
   
2. reduced footprint with removing all COMMAND constants, to
   help users, all commands are written into function documentation -
   which afaik is not part of the minified module version
   
3. shortened function names for those functions a user should not need for normal usage
   

1 Attachment

• SSD1606.js