support darwin cpu execution.
This PR adds darwin cpu execution of k-wave simulations and depends on darwin compilation of the binaries which will be published to github shortly.
closes #69
This PR depends on the publishing of the binaries and ability to download them upon install.
compilation is currently working but without openmp which makes it unbearably slow. Need to work on static compilation with openmp before merging this.
Currently, this branch of the k-wave binaries compiles and runs but returns Nans. This will need to be corrected before support for MacOS M1 can be merged in.
Replaced with #410