Jpeg images with non integer number of MCU pixels showed corrupted right
edge. Fix is to concatenate pixels into a contiguous block. Examples
corrected.
Reference to particular drivers in examples have been removed as
multiple display drivers are now supported.
Tabs replaced by spaces in header file by file editor.
RPi TFT with write strobe SPI clock rate dropped to 20MHz (display
cannot cope with new high rate siWriteBlock() function)