* Fix issue where UIGraphicsRendererFormat is mutated
As part of https://github.com/TextureGroup/Texture/pull/1629, we use the
preferred or default UIGraphicsRendererFormat. This was pointing to a
static variable which content scale was mutated across several graphic
render passes and lead to pixelated views.
* Update reference images with iOS 10.3
Currently ASImageNode would initially load the correct asset from the asset catalog but would not respond to changes in trait collections that would require loading a different asset from the asset catalog. This change allows use to use `-[UIImage imageAsset]` to reference the asset catalog entry for the current image and load the appropriate version based on the current trait collection
* Allow full color tinting on grayscale template images.
* Signing a commit with the correct email address.
* Add snapshot test for a grayscale image with ASExperimentalDrawingGlobal enabled.
* Add support for tinting layer-backed ASImageNode's
* Move tint color support ASDisplayNode
* Address comments, unlock before calling "tintColorDidChange" on
subclasses
* Address comments
- Add the ability to specify a tintColor for images / buttons that behave similarly to how they would under UIKit.
- Add flag to control if tint color is applied to ASTextNode to match how
UIKit controls if it is .applied to UILabel.
- Update tests for not-tinting automatic render mode for UIImage.
- Add property on ASTextNode2.
- Add tint color support to ASTextNode2.