Create Preliminary GPU bindings

As discussed in #149, we need to add bindings such that we can do GPU-powered maps in the bound languages. I'm thinking the way we do this is to make a function like Wrap<MemorySpace>(arr) or something, for each of the bindings, that takes in an host-language array (e.g. numpy, matlab, julia array) and spits out a wrapped Kokkos::View. Then, we can throw that into whatever functions we want (e.g. ConditionalMapBase, etc) without needing to change the base library. Then, we could template the binding functions (e.g. ConditionalMapBaseWrapper() for python) based on memory space, so we only have to write one set of bindings (hopefully!) for both memory spaces.

If someone puts in a raw host-language array, then I suppose we just assume that they mean to use Kokkos::HostSpace.

• Matlab
• Python
• Julia