Create README.md

Author: adamb70

README.md

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+# Python-Spherical-Projection
+Convert cubemap image to an equirectangular spherical projection image using Python 2.7.
+
+Currently only works with cubemaps laid out in the following format:
+  
+             ________
+            |        |
+            |   top  |
+            |        |
+     _______|________|_________________
+    |       |        |        |        |
+    | left  |  front |  right |  back  |
+    |       |        |        |        |
+    |_______|________|________|________|
+            |        |
+            |        |
+            |  down  |
+            |________|
+
+**Input Image**
+![input](https://github.com/adamb70/Python-Spherical-Projection/blob/master/Example/Example%201/input.jpg)
+
+**Output Image**
+![output](https://github.com/adamb70/Python-Spherical-Projection/blob/master/Example/Example%201/output.jpg)
+
+
+## Instructions
+
+* Open an image using PIL or equivalent.
+* Calculate dimensions of output image. (Width must be 2xheight. Height can be any percentage of input image, but larger output images lead to less precise results.)
+* Calculate length of each square face (ie. 1/3 height of the input, due to height being made from 3 faces - top,front,down)
+* Create an output image using the new dimensions.
+* For each pixel location in the output image run `cube2equi.find_corresponding_pixel()` to return the corresponding pixel in the input image.
+* Take the colour value for the input image pixel and apply it to the pixel in the output.
+
+## TODO
+
+* Automate all setup steps
+* Allow for different cubemap layouts