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.

2011/hamaji/README.md

@@ -61,7 +61,7 @@ Game of Life](http://en.wikipedia.org/wiki/Conway's_Game_of_Life):
        1
        .
       112
-\
+
     1  X
     1   X
     3 XXX
@@ -110,8 +110,8 @@ There are two solutions:
 
 ```
       11
-\
-    1 X\
+
+    1 X
     1  X
 ```
 
@@ -119,9 +119,9 @@ and
 
 ```
       11
-\
+
     1  X
-    1 X\
+    1 X
 ```
 
 ### Detail