drawBitmap() function is now set up for both horizontal and vertical addressed bitmap data,
Vertical is default. The addressing mode is changed by setDrawBitmapAddr(), new function.
Enum added for font name labels instead of raw numbers,
This will cause font compiler warnings for sketch’s written on versions before 1.3.0 , The sketch’s will still compile and work,
Simply replace font numbers with the relevant enum text labels to get rid of warnings.
A new function added for initialising a multibuffer struct , OLEDinitBufferStruct(),
backward compatible with old manual workflow.