Fix crop-projective composition

Fixes a bug where composing a `CroppedProjectiveTransform` with another
`ProjectiveTransform` would cause the cropping to be skipped. Now, this
instead creates a `Sequence` meaning the
crop is properly applied; however, the last projection is not fused with that before the
crop.

Author: lorenzoh

src/projective/crop.jl

@@ -101,6 +101,10 @@ function compose(composed::ComposedProjectiveTransform, cropped::CroppedProjecti
 
 end
 
+function compose(cropped::CroppedProjectiveTransform, projective::ProjectiveTransform)
+    return Sequence(cropped, projective)
+end
+
 
 """
     offsetcropbounds(sz, bounds, offsets)