Outputs a text message to the user.
XML example:
<MESSAGE>This is a sample message...</MESSAGE>
<ADD>
<MESSAGE>Adding outer metal area with Inner clearance...</MESSAGE>
<POLYGON>metal,6, 0,0, 2.5,0.1, 2.6,3.0, 1.0,2.2, 0,2.5, 0,0 </POLYGON>
<COMPOSITE>CLEAR</COMPOSITE>
<POLYGON>metal,5, 1,0.5, 2,1.0, 2,2.0, 1.2,2.0, 1,0.5 </POLYGON>
</ADD>