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.

2012/dlowe/README.md

@@ -1,7 +1,7 @@
 # Best way to lose a life
 
 J. David Lowe\
-US
+US\
 <j.david.lowe@gmail.com>\
 <https://github.com/dlowe>