cyclelayouts patch

- Apply cyclelayouts patch
- Add patch link to README
- Add new layout cycling keybindings to man page

config.h

@@ -53,6 +53,7 @@ static const Layout layouts[] = {
 	{ "|M|",      centeredmaster },
 	{ ">M>",      centeredfloatingmaster },
 	{ "HHH",      grid },
+	{ NULL,       NULL },
 };
 
 /* key definitions */
@@ -112,6 +113,8 @@ static Key keys[] = {
 	{ MODKEY,				XK_u,						setlayout,		{.v = &layouts[3]} },
 	{ MODKEY,				XK_o,						setlayout,		{.v = &layouts[4]} },
 	{ MODKEY,				XK_g,						setlayout,		{.v = &layouts[5]} },
+	{ MODKEY|ControlMask,	XK_comma,					cyclelayout,	{.i = -1 } },
+	{ MODKEY|ControlMask,	XK_period,					cyclelayout,	{.i = +1 } },
 	{ MODKEY,               XK_space,					setlayout,      {0} },
 	{ MODKEY|ShiftMask,     XK_space,					togglefloating, {0} },
 	{ MODKEY,               XK_0,						view,           {.ui = ~0} },