v1.3.0 published: Adafruit_GFX::setRotation() support

[Roger-random]

Bug Fix

• Previously a sketch could call Adafruit_GFX::setRotation(), but there would be no effect: this library's frame buffer code neglected to account for rotation. (setRotation support #21)

New Example

• Example named GFX_RotatedText has been added to illustrate how to use the now-working setRotation() to print text in one of four orientations, in one of three sizes.

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This discussion was created from the release v1.3.0 published: Adafruit_GFX::setRotation() support.