cleanup winner README.md files

Fixed cases where there was a bad trailing backslash.

Improved a few cases where a code block was needed
to highlight some text.

Changed a few cases where a code block needed to
declared as, say, a sh code block.

Fixed a few cases where the winner information was not properly formatted.

Plus a few nits and clarifying text was added.

2013/endoh2/README.md

@@ -57,9 +57,9 @@ straightforward bitmap comparison.
 
 * LZ77-like compression for font and template data
 * tiny JPEG encoder
-  * Zig-zag space-filling curve
-  * Discrete cosine transform
-  * JPEG Huffman encoding (cheating)
+    * Zig-zag space-filling curve
+    * Discrete cosine transform
+    * JPEG Huffman encoding (cheating)
 
 ### Notes