Add equality for transformations + tests

[Nyan11]

No description provided.

[tinchodias]

I have to check the reason of the red tests

[tinchodias]

I inspected change by change and don't understand how can this change affect the rendering of text (and the textd hit testing). Example (left: actual, right: "expected"):

I wonder if what is currently "expected" was buggy, and if after this change in the equals it's more correct now. Any clue, @Nyan11 ?

The test can be run with (BARenderTest buildSuiteFor: #buildTextAttributes) run.

To inspect the diff I captured, inspect: (BARenderTest buildSuiteFor: #buildTextAttributes) tests anyOne newPixelComparison

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EDIT: In my capture above, the diff shows all texts ~ half pixel up. Maybe like if in expected Form, the baseline is an integer value but in actual Form it is a Float.