Adds a rake command to read web server log files from a rails app layer instance
Changed --session-command to -c for Ubuntu compatibility
Adds helper for ssh and another helper for alternative to instance[:public_dns]. Adds config for weblogs. Changes logs to default to rails-app layer.
Changed name of webapp_logs_root to logs_root and corrected README accordingly.
Merge pull request #6 from ibussieres/master

Adds a rake command to read web server log files from a rails app layer instance