Disabled stddef.h for GLFW_INCLUDE_NONE, cleanup.
Added support for mouse buttons 4-n.
Documentation fixes for glfwSetCursorPos.
Added workaround for legacy MinGW.

When building on legacy MinGW, WINVER and UNICODE need to be defined
before the inclusion of stddef.h (by glfw3.h), which is itself included
before win32_platform.h.
Conditionally define API version macros.
Workaround for libXi and CMake 2.8.7.
Updated menu label for minimization.
Fixed OS X cursor bugs #3, #72 and #88.
Removed unused flag.
Added description of 3.0.3 release.
Added notes on swap interval defaults.
Added more detailed notes on some CMake options.
New theme for doxygen generated documentations.
Removed invisible element.
Merge pull request #141 from siavashserver/doxygen-theme

Added Doxygen documentation theme.
Removed index.html from URL.
Updated notes referring to Mac OS X.
Started 3.0.4.
Added references to build guide.
Fixed Grave and World 1 being flipped.