Merged SDL2 changes from bartbes/love-experiments/SDL2 into default.

- Added love.system module, including clipboard functions.

- Added custom hardware cursors (love.mouse.newCursor, love.mouse.setCursor.)

- Revamped love.joystick:
-- added Joystick objects and moved love.joystick functions which operated on individual joysticks to methods on the Joystick objects.
-- Added love.joystick.getJoystick and love.joystick.getJoystickCount.
-- Added events for when joysticks are connected and disconnected.
-- Added 'Gamepad' methods to Joystick objects: Joystick:isGamepad, Joystick:getGamepadAxis, and Joystick:isGamepadDown. They're a common abstraction for xbox controller-like joystick across operating systems.

- Added monitor choosing support and "fullscreen desktop" mode to love.window.

- Moved unicode text input events to their own callback function (love.textinput), removed the key repeat functions from love.keyboard and made the second argument of love.keypressed a boolean saying whether the keypress was a repeat.

- liblove now works with love.window and love.graphics in OS X

src/modules/thread/ThreadModule.cpp

@@ -24,10 +24,6 @@ namespace love
 {
 namespace thread
 {
-const char *ThreadModule::getName() const
-{
-	return "love.thread.sdl";
-}
 
 LuaThread *ThreadModule::newThread(const std::string &name, love::Data *data)
 {
@@ -44,5 +40,11 @@ Channel *ThreadModule::getChannel(const std::string &name)
 {
 	return Channel::getChannel(name);
 }
+
+const char *ThreadModule::getName() const
+{
+	return "love.thread.sdl";
+}
+
 } // thread
 } // love