Add a command line script for rendering templates.

[hodgestar]

There was a request for a command line script for rendering templates that was filed on the Debian package -- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=527236.

The documentation for the kid script mentioned in the bug report is:

Usage: kid [options] file [args]
Expand a Kid template file.

OPTIONS:

  -e enc, --encoding=enc
          Specify the output character encoding.
          Default: utf-8
  -o outfile, --output=outfile
          Specify the output file.
          Default: standard output
  -s host:port, --server=host:port
          Specify the server address if
          you want to start the HTTP server.
          Instead of the Kid template,
          you can specify a base directory.
  -h, --help
          Print this help message and exit.
  -V, --version
          Print the Kid version number and exit.

file:
  filename of the Kid template to be processed
  or "-" for reading the template from stdin.

args:
  key=value or other arguments passed to the template.

This isn't high priority, but also isn't hard to implement.