Request logger

Hello @dpup, 

Please review the following commits I made in branch 'vinny-request-logger'.

I created a RequestMessage, which is basically a string builder with
request info. I also added a default development environment request logger
to console.info, but in different environments someone can just
use a logger they want and a Request Message they want.

Request message is the class responsible for building the message. You
can plug new  "request events" such as database calls. This mechanism
may need some further review, but it is enough for my own scenario.

2c136ce95bb4a6ac2228a90b5be27cbf6a0aafb1 (2013-07-18 17:54:31 -0700)
Creating a default request logger


R=@dpup