Renamed love.graphics.getMaxImageSize to love.graphics.getMaxTextureSize (old function is still there, but deprecated.)

src/modules/graphics/opengl/wrap_Graphics.h

@@ -50,7 +50,7 @@ int w_setScissor(lua_State *L);
 int w_getScissor(lua_State *L);
 int w_setStencil(lua_State *L);
 int w_setInvertedStencil(lua_State *L);
-int w_getMaxImageSize(lua_State *L);
+int w_getMaxTextureSize(lua_State *L);
 int w_newImage(lua_State *L);
 int w_newQuad(lua_State *L);
 int w_newFont(lua_State *L);