replace trailing whitespace with blackslash in README.md

As an alternative to the markdown trailing whitespace as a line
break, we use a trailing blackslash as a markdown line break.

2011/hou/README.md

@@ -1,6 +1,6 @@
 # Best self documenting program
 
-Hou Qiming   
+Hou Qiming\
 <hqm03ster@gmail.com>
 
 ## To build: