This changes the behavior of framebuffer hints set to zero. Before,
zero meant that any value was acceptable. This changes zero to be an
explicit preference and adds GLFW_DONT_CARE to mean that any value is
equally acceptable.
Fixes#70.
By default, full screen windows that lose focus will be iconified and
the video mode will be restored. This makes it impossible to create
applications spanning multiple monitors. The GLFW_AUTO_ICONIFY window
hint will allow users to disable this behavior.
Fixes#143.
Parameters are something specified at creation time and are often
immutable, while many of the values returned by glfwGetWindowParam
reflected current state not controlled by any parameter or hint.
Camilla Berglund
Eddie Ringle