Remove dependency on libfuse

[thinkmoore]

Currently, libfuse is only used to invoke mount_compat which shells out to fusermount to mount a FUSE filesystem. At the very least, the library can shell out itself, if not implement the necessary functionality from fusermount.

[jakeisnt]

Hey, I'd like to use this library but am having some trouble with the libfuse dependency.
Do you have any interest in fixing this issue?
If not, do you have any resources I could look into for completing this myself? Thanks for your work on this library!

[thinkmoore]

Unfortunately I don't have time right now to work on this project. Trying to dredge things up from memory, you'll want to look at the FUSE documentation for the API call fuse_mount. The fuse_mount_compat25 symbol that the library loads looks pretty specific to the version of libfuse on MacOS at the time I was working on the library. The slight trick is that in C you can just import fuse.h and call fuse_mount, which might be a macro. Since this library is using FFI to load the shared library, it needed to reference the specific C function that actually implements the mount functionality---the name and exact API of this function may have changed.

If you dig a little and have a question or two, I'll do my best to help. :)