title: why is my maven plugin descriptor not being generated automatically?
body: <p>I have wrote my own plugin project and have run the command <code>mvn -install</code> through cygwin for my plugin project.
  the jar file for it is being created in my repository, however when I execute my plugin, it says that my plugin descriptor is not present. I checked my jar file which was created and indeed it is not automatically created inside there.</p>
  
  <p>I tried copying a sample <code>plugin.xml</code> and included it into my jar file and it worked. I would like to know if anyone knows why my plugin descriptor isn't created automatically?</p>