Make INFO the default log level, and upgrade certain logs to info level
Make the log level configurable
Make the status code clearer in HTTP response logs
Merge remote-tracking branch 'remotes/origin/master' into log_levels
Merge branch 'master' into log_levels
Markups
Merge pull request #83 from Metaswitch/log_levels

[Reviewer: Rob, From: Alex] Make homestead logging less verbose by default.