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/mouse/wrap_Cursor.cpp

@@ -0,0 +1,66 @@
+/**
+ * Copyright (c) 2006-2013 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+// LOVE
+#include "wrap_Cursor.h"
+#include "Cursor.h"
+
+namespace love
+{
+namespace mouse
+{
+
+int w_getType(lua_State *L)
+{
+	mouse::Cursor *cursor = luax_checktype<mouse::Cursor>(L, 1, "Cursor", MOUSE_CURSOR_T);
+
+	Cursor::CursorType ctype = cursor->getType();
+	const char *ctypestr;
+
+	if (!mouse::Cursor::getConstant(ctype, ctypestr))
+		return luaL_error(L, "Unknown cursor type.");
+
+	lua_pushstring(L, ctypestr);
+
+	Cursor::SystemCursor systype = cursor->getSystemType();
+	const char *systypestr;
+
+	if (mouse::Cursor::getConstant(systype, systypestr))
+	{
+		lua_pushstring(L, systypestr);
+		return 2;
+	}
+
+	return 1;
+};
+
+static const luaL_Reg functions[] =
+{
+	{ "getType", w_getType },
+	{ 0, 0 },
+};
+
+extern "C" int luaopen_cursor(lua_State *L)
+{
+	return luax_register_type(L, "Cursor", functions);
+}
+
+} // mouse
+} // love