Added initial joystick support on OS X

src/cocoa_init.m

@@ -225,6 +225,8 @@ int _glfwPlatformInit(void)
     _glfwLibrary.NS.desktopMode =
 	    (NSDictionary*) CGDisplayCurrentMode(CGMainDisplayID());
 
+    _glfwInitJoysticks();
+
     return GL_TRUE;
 }
 
@@ -243,6 +245,8 @@ int _glfwPlatformTerminate(void)
     [_glfwLibrary.NS.autoreleasePool release];
     _glfwLibrary.NS.autoreleasePool = nil;
 
+    _glfwTerminateJoysticks();
+
     return GL_TRUE;
 }