More op tests
Add ComposedOp
Op inverse implementations
InverseOp
Inverse tests
ITransform interface
Make Op implement 1D ITransform
Compose op inverse
Misc fixes
compose overrides
add ALinearOp base class
Identity extends ALinearOp
constant extends ALinearOp
LinearOp extends ALinearOp
Misc linear op fixes
Test equivalent transform
Inverse fixes
scalar op application
Add ClampOp
clampop on arrays