Added macros for library initialization check.
Removed platform-specific resources from monitor.
Made glfwGetMonitorPos immediate.
Unified Win32 cursor clip rect setting.
Minor cleanup of Win32 window code.
Documented known bugs.
Added missing credit.
Fixed print screen key input for all platforms.
Added fading to Cocoa display mode setting.
Formatting.
Put findAppName under _GLFW_USE_MENUBAR.
Added external documentation files.

Added initial quick tutorial, compatibility appendix, transition guide
and external main page.
Added missing version string API tag.
Added glfwMakeContextCurrent to quick tutorial.
Made character unsigned.
Formatting.
Documented error return values.
Merge branch 'master' of https://github.com/elmindreda/glfw.git
Documentation work.
Merge branch 'master' of https://github.com/elmindreda/glfw.git