--- /dev/null
+(1) 23 Aug, 2010
+ Add an option "-num_threads" to allow uses to specify the number of
+ threads useda
+(2) 12 April, 2012
+ GCC 4.6 can successfully compile it.
+
+(3) 3 July, 2012
+ Add a new option "-o" (or "--outfile") to allow users to specify the output file name.
+ By default, it will output to STDOUT