look for metadata in js optimizer starting at the end
do not run simplifyExpressions in -O1
make EM_ASM use strings on the heap, so it works in asm, and cache the generated functions
enable asm validation checks in unistd tests using EM_ASM
Merge branch 'incoming'
Fixed a few warnings in cubegeom tests
Switched off antialiasing by default for WebGL contexts.
Allowed customization of context attributes through Browser.createContext().
Added myself to AUTHORS
Implemented antialiasing for GLFW contexts.
The WebGL context is created with antialiasing if GLFW_FSAA_SAMPLES is bigger than 1.