Merge pull request #59 from nistormihai/master

LB-1465 Production unleashed.
LB-1512 Add logging
LB-1512 Log query string on node.js server request
LB-1512 Fix: don't create new log file each time
LB-1512 Add grunt-env
LB-1512 Log to stdout on prod and to file on dev
Merge pull request #60 from patriciagarcia/LB-1512

LB-1512 Add logging