coyote: CGKML2KMZ

Description
This program simply collects files created from the cgImage2KML program and moves
the files to a zip file with a *.kmz file extention. The program requires that the
file archiver 7-Zip be installed on the user's computer. The 7-Zip program is freeware
and is available for Windows, Mac, and UNIX users. Addtional information about the 7-Zip
program can be found on the `7-Zip web page `. The current program
runs on Windows computers only, and with 7-Zip installed in the C:\Program Files directory.
You may have to modify the path the the 7z.exe executable file to get the program to work
correctly for you. The line to modify is clearly marked below.
KMZ files are simply zip files containing KML files and support files. You can create your
own KMZ files with any archiving software that supports the ZIP compression format.
Categories
Utility
Params
kml_filename: in, optional, type=string
     The name of a KML file to package as a KMZ file.
supportfiles: in, optional, type=string
     A scalar or vector of files to be included with the KML file to be packaged.
     If not present, files in the same directory as the KML file and having the
     same base filename will be used.
Keywords
showcmd: in, optional, type=boolean, default=0
    Set this keyword if you wish to see the command being spawned by the program.
silent: in, optional, type=boolean, default=0
    Set this kewyord to avoid output (except program errors) from being printed.
Examples
Here is how to use this program with the Google Earth Image example in the
`Coyote Gallery `. The result is a file
named "google_earth_image.kmz" that can be loaded into Google Earth.
   IDL> Google_Earth_Image
   IDL> kml2kmz, 'google_earth_image.kml'
Author
FANNING SOFTWARE CONSULTING::
   David W. Fanning 
   1645 Sheely Drive
   Fort Collins, CO 80526 USA
   Phone: 970-221-0438
   E-mail: david@idlcoyote.com
   Coyote's Guide to IDL Programming: http://www.idlcoyote.com
History
Change History::
   Written, 22 Fabruary 2013 by David W. Fanning.
   Modified from using the old, unsupported and undocumented IDLKML_SaveKMZ routine to using 
      the Open Source 7-Zip routine to do the compression. 16 March 2014. DWF.
Copyright
Copyright (c) 2013, Fanning Software Consulting, Inc.