[WFA] Daemonize robinhood

**TODO**
- [x] Add Docs
- [x] ```LOGFILE```seems to not be working
- [ ] Increase Gem version?
- [x] Review option not found logic

**PROBLEMS**
I'm having some problems specifying a different path to store the logs files, it seems that it's the same what I set, it always store the logs in the same directory ('log') I've found this recent issue on stackoverflow that is similar to our problem http://stackoverflow.com/questions/18641609/how-do-i-set-options-for-logging-output-in-ruby-gem-daemons