demtools suport

[cbalint]

For preliminary i would like to post as proposal a small patch which could get demtools to gdal as auxiliary DEM rendering utility.

Link to original SVN trunk here:  http://perrygeo.googlecode.com/svn/trunk/demtools/

One issue could be apache license, but Matt can comment over, i Cc him. Let me know if you request a full patch over gdal-trunk including GNUMakefile and Makefile.vc and conversion from cout -> printf, in plus probably a better format of "Usage" and help section, and do something better with scale.txt configuration file.

Attached patch does for now:

• fix gcc43 complie issue and warnings (olso do VC2008)
• get rid of stingtoken.h and use gdal internals for this
• add progressbar as gdal tools does, using gdal API
• use more gdal internals for for some fopen/fclose handling

[cbalint]

patch for upstream demtools.

[rouault]

This is a duplicate of #2640