Exceptions are:
1) SparseLinear
requires additional parameters to be passed in (e.g. nbatches),
so it's not clear it's worth moving to C since it won't really simplify the binding
code logic.
2) BatchNormalization
requires "makeBatch", which isn't a trivial translation to C.
3) LookupTable
requires "view" in C, which is already a TODO
4) SpatialUpSamplingBilinear
requires "view" in C, which is already TODO
