File Watcher

• The file-watcher creates a file on the bus when a new file has been detected in the templated path
• by default the check happens for the past 24 hours each hour

Option Params:

• topic
  • default files topic is 'files' but can be over written
• lookback
  • the amount of time to check back for file changes (for each directory)
• path_template
  • the base path template to be searched for file changes uses a year/month/day/hour file template lookup
• aws_access_key & aws_secret_key
  • must be provided to access the S3 bucket
• frequency
  • the duration between times when the path is checked for new files