Support MacOS and CMake

[leoauri]

Support use as library for building on MacOS. Uses CMake for build

Only tested on Mac...
Feedback welcome :)

Closes #3

[leoauri]

Replaces the hidapi with a submodule.

[SilverTuxedo]

Thank you for your contribution!

I fixed the solution files and some headers for this to still compile under Windows. Can you make sure you can still build this on Mac?

[leoauri]

Hm. Actually, before the commit it compiled for me, now it doesn't:

.../JoyConBridge/src/JoyConBridge/exceptions.cpp:2:10: fatal error: 'hidapi/hidapi.h' file not found
#include "hidapi/hidapi.h"
         ^~~~~~~~~~~~~~~~~

[leoauri]

Does this work for you?

[leoauri]

Another thing is that, if I include this, I still have to bundle the hidapi library manually. I just did it like this:

if (APPLE) 
    # Loads dylibs from bundle
    set_target_properties(MyTarget PROPERTIES
        BUILD_WITH_INSTALL_RPATH FALSE
        LINK_FLAGS "-Wl,-rpath,@loader_path/"
    )
    add_custom_command(
        TARGET MyTarget
        POST_BUILD
        COMMAND cp "${CMAKE_BINARY_DIR}/JoyConBridge/src/JoyConBridge/hidapi/src/mac/*.dylib"
        "${CMAKE_BINARY_DIR}/MyTarget_artefacts/${CMAKE_BUILD_TYPE}/path/to/target/Contents/MacOS/"
        COMMENT "Copy HIDAPI dylibs target"
    )
endif()

Otherwise, the built artefact is not distributable.

There's probably a more robust way though...