Fix #56
Delete empty space
Fix #8
Fix #40
Formatting
Remove extra function call
Update README.md
Fix #37
Merge branch 'devel' of https://github.com/go-gl/glfw3 into devel
Update README.md
Update README.md
Added a dependency in Darwin for framework CoreVideo required by GLFW
Update README.md
Add glfwPostEmptyEvent() support.
Add glfwSetDropCallback() support.

The cgo to Go type conversion in `goDropCB` is unfinished and needs to
be improved.
Merge from devel
Merge branch 'feature/add-glfwPostEmptyEvent' of https://github.com/shurcooL/glfw3
Merge from shurcooL:feature/add-glfwSetDropCallback