Extend tile operations to operate on Tensors

[jpolchlo]

Rasterframes provides a set of catalyst expressions that operate on Tile-valued columns. These need to be extended to allow for combinations of Tiles and Tensors.

Specifically, BinaryLocalRasterOp, BinaryRasterOp, UnaryLocalRasterOp, UnaryRasterOp and perhaps others need to have their op or eval methods extended to allow for Tensor arguments. This will propagate to the various subclasses, which need their implementations extended. This will likely require an update to the Tensor API to enable these operations.

[jpolchlo]

The infrastructure for BinaryLocalRasterOp is provided by #17. We still need to expand the coverage to all of the local ops. Only Add is currently implemented.

[jpolchlo]

These operations also need to be extended to deal with BufferedTensor.