This helps a ton, thanks.
After poking around with the compiler options, I found that the key here is the
`--header` flag. I ended up with a simple line that looks like this:
`nim objc -c --noMain --header *.nim`
The header flag has the same name as the file you compiled, so compiling a Nim
file called `yourfilehere.nim` will give you a `yourfilehere.h` that you can
import into your other Objective-C files. As long as you have procedures marked
with the `{.exportc.}` pragma you'll be able to call them from your code.
