Update README.md
Check in the GLFW sources.
Use direct includes to our copy of GLFW sources.
AUTHORS: add Stephen Gutekanst
Add includer files that simply include GLFW sources directly.
Add build.go that specifies GLFW build options and linker options.
README: mention build process
Fix windows build (don't include posix things)
Fix OS X build - lose GetCocoaWindow() and GetNSGLContext().
Mention revision used in changelog.
Update GLFW sources to revision mentioned in changelog.

5d525c4a5f9da0b8744f29affbf77d3a9580905c
Merge branch 'devel_glfw3.1' of https://github.com/go-gl/glfw3
Fix build on OS X Mavericks (10.9.1); Add -Wno-deprecated-declarations
Merge pull request #84 from slimsag/devel_glfw3.1

Make the package go-gettable (devel_glfw3.1)
Update to #74
Fix undefined symbols on Windows. See go-gl/glfw3#82
Merge pull request #87 from slimsag/master

Fix undefined symbols on Windows. See go-gl/glfw3#82