Added blank cursor creation error checking on X11.
Enabled OpenGL 3.x and 4.x context on OS X 10.9.
Updated references to OS X (previously Mac OS X).
Fixed documentation tag name.
Updated OS X OpenGL compatibility docs.
Moved to auto-updated docs URLs.
Merge pull request #86 from siavashserver/master

Added utility functions for X11 error handler.
Cleaned up X error handler work.
Tagged close flag for use from secondary threads.
Added GLFW_OPENED to transition guide.
Moved X11 character translation failure test.
Cleanup of size_t use.
Merge branch 'master' of https://github.com/glfw/glfw
Changed scrollWheel to use precise scrolling deltas when available.

Use precise scrolling deltas only on supported versions of OS X;
hasPreciseScrollingDeltas, scrollingDeltaX, scrollingDeltaY are
available in OS X v10.7 and later.
Replaced a single occurence of a tab character with 4 spaces for
consistency in src/socoa_window.m.
Updated extension headers.
Merge pull request #95 from shurcooL/master

Added support for Cocoa precise scrolling deltas.
Updated extension headers.
Enabled inclusion of stddef.h on all platforms.

The OS X gl.h defines section macros that prevents glext.h from
including stddef.h, leaving it undeclared when it's later used.
Added explanation for #error.
Fixed #if-guard logic and signature for hasPreciseScrollingDeltas.