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/Cursor.cpp

@@ -0,0 +1,79 @@
+/**
+ * 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.
+ **/
+
+#include "Cursor.h"
+
+namespace love
+{
+namespace mouse
+{
+
+Cursor::~Cursor()
+{
+}
+
+bool Cursor::getConstant(const char *in, SystemCursor &out)
+{
+	return systemCursors.find(in, out);
+}
+
+bool Cursor::getConstant(SystemCursor in, const char *&out)
+{
+	return systemCursors.find(in, out);
+}
+
+bool Cursor::getConstant(const char *in, CursorType &out)
+{
+	return types.find(in, out);
+}
+
+bool Cursor::getConstant(CursorType in, const char *&out)
+{
+	return types.find(in, out);
+}
+
+StringMap<Cursor::SystemCursor, Cursor::CURSOR_MAX_ENUM>::Entry Cursor::systemCursorEntries[] =
+{
+	{"arrow", Cursor::CURSOR_ARROW},
+	{"ibeam", Cursor::CURSOR_IBEAM},
+	{"wait", Cursor::CURSOR_WAIT},
+	{"crosshair", Cursor::CURSOR_CROSSHAIR},
+	{"waitarrow", Cursor::CURSOR_WAITARROW},
+	{"sizenwse", Cursor::CURSOR_SIZENWSE},
+	{"sizenesw", Cursor::CURSOR_SIZENESW},
+	{"sizewe", Cursor::CURSOR_SIZEWE},
+	{"sizens", Cursor::CURSOR_SIZENS},
+	{"sizeall", Cursor::CURSOR_SIZEALL},
+	{"no", Cursor::CURSOR_NO},
+	{"hand", Cursor::CURSOR_HAND},
+};
+
+StringMap<Cursor::SystemCursor, Cursor::CURSOR_MAX_ENUM> Cursor::systemCursors(Cursor::systemCursorEntries, sizeof(Cursor::systemCursorEntries));
+
+StringMap<Cursor::CursorType, Cursor::CURSORTYPE_MAX_ENUM>::Entry Cursor::typeEntries[] =
+{
+	{"system", Cursor::CURSORTYPE_SYSTEM},
+	{"image", Cursor::CURSORTYPE_IMAGE},
+};
+
+StringMap<Cursor::CursorType, Cursor::CURSORTYPE_MAX_ENUM> Cursor::types(Cursor::typeEntries, sizeof(Cursor::typeEntries));
+
+} // mouse
+} // love