introduce a 'build' directory
1st emscripten version, based on original c++ code
update comments in emscripten C++ version
rename sweepcontext.js to sweepcontext-cpp.js for emscripten C++ version
1st commit for emscripten C version (failing)
fix C bindings for emscripten
update readmes
update glib
minor code update
fix C version
C version : speed improvments and fix memory leaks