Shearing + disabled scale inheritance + flipY = true does not work as intended.

[badlogic]

Repro http://esotericsoftware.com/forum/download/file.php?id=3559

The arm bone has skew on it in the default animation. That plus flipY set to true will result in this

When this is the expected output:

[badlogic]

Bone:210 is wrong, this only works if a,b,c,d form an ortho basis, which is not the case if shearing is applied.

[badlogic]

If flip is set on skeleton, then root encodes flipping. However, in noScale, noScaleOrReflection case, that root flipping is smoked when we reconstruct parent local y-axes. We need to flip parent local y-axes manually in that transformation mode, as it is reconstructed from ortho normal basis, and does not encode flipping anymore.

[badlogic]

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