title: Magento module correct place to put additional files
body: <p>I'm writing a module that needs to send an xml string to a 3rd party once an order is placed. The xml is in a particular format that I need to keep it in.
  I was going to have the xml template stored somewhere so I could read it in and replace the required tags with my data in my observer.</p>
  
  <p>My question is, where is the best place to store that xml file? Can I simply create a new folder in my module for "extras" and have it in there? Or is that bad practice?</p>
  
  <p>Thanks</p>