Changes:
* New command line argument --(no)safer which allows setting
-dNOSAFER instead of -dSAFER (only for non-restricted).
* New command line argument --pdfsettings for
Ghostscript's -dPDFSETTINGS.
* New command line argument --(no)quiet.
* New command line argument --device for specifying a differnt
Ghostscript device (limited set of devices for restricted mode).
* New command line arguments --gsopts and --gsopt for adding
Ghostscript options.
* Full support of ghostscript's option -r, DPIxDPI added.
* Support for DOS EPS binary files (TN 5002) added.
* Removes PJL commands at start of file.
* explain option naming conventions (= defaults for Getopt::Long).
* use /usr/bin/env, since Ruby has apparently required #! for years,
and we rely on it for our other scripts, so why not.
* uselessly placate -w. Debian bug 672281.
