Version 1.2.4
- added support for GDEH0154D67 1.54" b/w, replacement for GDEP015OC1 - added GxEPD2_SerialFlash_Loader, WiFi bitmap downloader for SPI-flash - added GxEPD2_SerialFlash_Example, SPI-flash example, e.g. for Winbond 25Q16BVSIG - minor fixes and comment cleanups - fix refresh(false) in upper layer: add powerOff() after full refresh