Log in log/production.log when environment is production
add production log file
add express logger to log in log/production.log
remove flash
change server message
Merge remote-tracking branch 'upstream/master' into feature/LogInProduction
use NODE_ENV instead of ENV_VARIABLE
redifine console.log only if environment is production
removeuseless options
Merge pull request #10 from poupotte/feature/LogInProduction

Log in production