Add enscript

[ZanyMonk]

As per enscript manual:

-I filter, --filter=filter
   Read all input files through an input filter filter.  The input filter can be a single command or  a  command
   pipeline.  The filter can refer to the name of the input file with the escape `%s'.  The name of the standard
   input can be changed with the option `--filter-stdin'.

   For example, the following command prints the file `foo.c' by using only upper-case characters:

       enscript --filter="cat %s | tr 'a-z' 'A-Z'" foo.c
-o file An alias for the option -p, --output.
-p file, --output=file
   Leave the output to file file. If the file is `-', enscript sends the output to the standard output stdout.
-q, --quiet, --silent
   Make enscript really quiet. Only fatal error messages are printed to stderr.

[cyrus-and]

Thanks!