title: Maven: Including a META-INF folder in the classes folder
body: <p>I have a very simple WAR project and I want to include a directory named <code>META-INF</code> at the top of the classes output folder where all the compiled Java classes are. 
  I'm using Maven, but it seems that by default Maven won't include anything that is not a Java class. So it ignores my <code>META-INF</code> directory that is sitting at the top of the <code>src</code> directory. 
  The <code>META-INF</code> directory contains a file named <code>persistence.xml</code>. Any quick pointers on how to instruct Maven to put this directory and file into the output folder?</p>