cmake: Output a message when GLEW is found.
cmake: Don't force including windows.h

It causes problems.
cmake: Improve DirectX detection.

In respect to MSVC 2013 / WinSDK 8.1
apps/gl: Just require a recent GLEW.
Use a specific return code for skips.
cli: Fix testing when build dir != source dir.
cli: Do CRLF line translation.
cli: Don't clobber index.html.

As that might not work when running in parallel.
apps/gl: Port tri to GLFW.
Import glfw-3.0.4.
Use glfw for gles1 test case.

Requires a bundled glfw.
glfw: Fix target name.