Update list for DWG to TIFF command line

DWG to TIFF command line 2.0 changelog from October 9, 2009

DWG to TIFF command line 1.1 from January 23, 2008

Major Update

Older DWG to TIFF command line versions:

• 2.0 (Oct 9, 2009) • 1.1 (Jan 23, 2008) •