#8 can't find dxf files at cmd line batch

[Andrew Bibb]

Batch processing from the command line was not
finding any DXF files for batch plotting or batch
converting. Using the GUI DXF files are processed
properly. You only need this patch if you use LX-
Viewer from the command line.

This patch also fixes a problem with Viewer
remaining resident after command batch
processing is complete

[Andrew Bibb]