Build in webassembly

[KnicKnic]

liblqr can be used by ImageMagick. There is a version of ImageMagick that is compiled to webassembly (via emscripten). There is an ask for liblqr support KnicKnic/WASM-ImageMagick#34 .

The current hangup is the dependency on glib. The only information I could find on glib & webassembly is avaialable at https://brionv.com/log/2018/05/27/emscripten-fun-libffi-on-webassembly-part-2/

@Brion Did you get any further in your glib experiments?

@carlobaldassi any suggestions?

[carlobaldassi]

I don't know enough about emscripten/webassembly to say anything useful, unfortunately.

As for glib, it's used everywhere for portable types and a few convenience functions and it would require some work to substitute those, however I think that the main obstacle in getting rid of it would probably be the atomic operations like this one.