Function take double instead of integer
typedef void (* GLFWscrollfun)(GLFWwindow*,double,double);
GLFW2 use same function callback as GLFW3
Right name for mouse and scroll event handlers
Add Petr B. as author
Tests for glfw3 events
Mistype
Merge branch 'glfw-fix' of https://github.com/babcca/emscripten into incoming