Created NeoMosaic object (markdown)

NeoMosaic-object.md

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+The NeoMosaic object is constructed with one layout "method" that provides the mapping from the 2d coordinate system to index that the NeoPixelBus requires. 
+```
+template <typename T_LAYOUT> class NeoMosaic
+```
+The T_LAYOUT will define how the pixels on an individual matrix panel are laid out.  Orientation is ignored.  
+
+The NeoMosaic object will use its own layout for the matrix panels, and it will rotate the panels to shorten the interconnection distance between panels.
+
+Once you have constructed one, you can then use it map a given x,y to the index and use this set a pixel color.
+```
+NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
+NeoMosaic <RowMajorAlternatingLayout> mosaic(
+    PanelWidth,
+    PanelHeight,
+    TileWidth,
+    TileHeight);
+
+...
+strip.SetPixelColor(mosaic.Map(4, 5), RgbColor(16,16,98));
+
+```
+
+Using the NeoPixelsMosaicDump.ino sample, the following are some example layouts.
+
+#### NeoMosaic \<ColumnMajorAlternatingLayout\> mosaic()
+```
+		0	1	2	3	4	5	6	7	
+	-------------------------------------------------------------------
+  0	|	0<	7	8	15>	16<	23	24	31>	
+  1	|	1	6	9	14	17	22	25	30	
+  2	|	2	5	10	13	18	21	26	29	
+  3	|	3	4	11	12	19	20	27	28	
+  4	|	60	59	52	51	44	43	36	35	
+  5	|	61	58	53	50	45	42	37	34	
+  6	|	62	57	54	49	46	41	38	33	
+  7	|	63>	56	55	48<	47>	40	39	32<	
+
+```