Move logger tools under scripts/util
Have logger operator<< support any input type
Improve comment layout
Add script to sort the log messages in chronological order

It appears that sometimes the messages are not in order, I am not sure
how that occur. Anyway, this really adds another burden to
debugging. That script fixes that. Maybe the logger should be fixed in
the first place but I don't know how.
Merge pull request #730 from ngeiswei/logger_tools

Logger tools