Update Animated_dial.ino

Correct error in example that became apparent with recent library updates.

Bodmer#682 Add created() function for sprites

New function added:
  bool created(void);
to check if sprite has been rotated. Example:

if ( !spr.created() ) Serial.println("Sprite has not been created");

Raise version to 2.2.6

ESP32 DMA update

dmaBusy() checks and is no longer blocking
pushImageDMA() faster if setAddrWindow is not built into transaction list.

Fix Sprite 1bpp scroll bug

Sprite scroll function fixed for 1bpp
readPixelValue() updated

Performance of circle drawing functions improved.

Version raised to 2.2.0

Update README.md

Raise version

Fix Bodmer#406

Fix image cropping bug plus minor update

Images/sprites overlapping both sides of the display were not correctly
cropped.
Option added to allow RGB<>BGR colourr swap option to be used.
ESP8266 Wemos D1 R1 pin numbering difference accomodated.
TTGO T4 setup changed to use HSPI port.

Update for Bodmer#379

Added support for ST7789 135 x 240 display which needs offsets
Added Setup135_ST7789.h as an example setup file for ESP8266