Updated NeoTopology object (markdown)

NeoTopology-object.md

@@ -1 +1,59 @@
-(under construction)
+The NeoTopology object is constructed with a layout "method" that provides the mapping from the 2d coordinate system to index that the NeoPixelBus requires. 
+```
+template <typename T_LAYOUT> class NeoTopology
+```
+The T_LAYOUT will define how the pixels on the matrix panel are laid out.  See [Layout objects](https://github.com/Makuna/NeoPixelBus/wiki/Layout-objects) for all the possible "methods".
+
+Once you have constructed one, you can then use it map a given x,y to the index, which can then be used to set a pixel color.
+```
+NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
+NeoTopology <RowMajorAlternatingLayout> topo(PanelWidth, PanelHeight);
+
+...
+strip.SetPixelColor(topo.Map(4, 5), RgbColor(16,16,98));
+
+```
+
+Using the NeoPixelsTopologyDump.ino sample, the following are some example layouts.
+
+#### NeoTopology \<ColumnMajorAlternatingLayout\> topo(8,8)
+```
+		0	1	2	3	4	5	6	7	
+	------------------------------------------------------------------
+  0	|	0	15	16	31	32	47	48	63	
+  1	|	1	14	17	30	33	46	49	62	
+  2	|	2	13	18	29	34	45	50	61	
+  3	|	3	12	19	28	35	44	51	60	
+  4	|	4	11	20	27	36	43	52	59	
+  5	|	5	10	21	26	37	42	53	58	
+  6	|	6	9	22	25	38	41	54	57	
+  7	|	7	8	23	24	39	40	55	56	
+```
+
+#### NeoTopology \<RowMajorAlternatingLayout\> topo(8,8)
+```
+		0	1	2	3	4	5	6	7	
+	------------------------------------------------------------------
+  0	|	0	1	2	3	4	5	6	7	
+  1	|	15	14	13	12	11	10	9	8	
+  2	|	16	17	18	19	20	21	22	23	
+  3	|	31	30	29	28	27	26	25	24	
+  4	|	32	33	34	35	36	37	38	39	
+  5	|	47	46	45	44	43	42	41	40	
+  6	|	48	49	50	51	52	53	54	55	
+  7	|	63	62	61	60	59	58	57	56	
+```
+
+#### NeoTopology \<RowMajorLayout\> topo(8,8)
+```
+		0	1	2	3	4	5	6	7	
+	------------------------------------------------------------------
+  0	|	0	1	2	3	4	5	6	7	
+  1	|	8	9	10	11	12	13	14	15	
+  2	|	16	17	18	19	20	21	22	23	
+  3	|	24	25	26	27	28	29	30	31	
+  4	|	32	33	34	35	36	37	38	39	
+  5	|	40	41	42	43	44	45	46	47	
+  6	|	48	49	50	51	52	53	54	55	
+  7	|	56	57	58	59	60	61	62	63	
+```