wayland: Remove unused code
wayland: Add support for resizing windows
wayland: Destroy window context before clearing the egl surface
Merge pull request #321 from ricardomv/wayland-resize

Add support for resizing windows on Wayland.
Fixed callback syntax in tutorial.
Added RandR header inclusion to native header.

Fixes #222.
Fixed video modes not being rotated to match CRTC.

Fixes #284.
Quoted all CMake paths with substitution.

Fixes #258.
Use CMake threading variable for Wayland.
Removed link interface no-op.

Closes #327.
Made glfwGetCursorPos query system directly.

Fixes #103.
Aligned Win32 cursor pos path with X11 path.
Added glfwGetKeyName.
Documentation work.