This can be considered a temporary fork while I work out the details of adding options to the CMake build system enabling an optional Emscripten build of the library. History is expected to be rewritten.
At the moment a very crude build can be accomplished via:
$ emcc --pre-js js/gme-pre.js --post-js js/gme-post.js -O3 --bind -std=c++11 -o gme.js gme/*.cpp