v3.7 [Apr 7, 2008]
-fix of formula to restore backward compatibility of heightfield on red+green non-indexed color image (not only backward compatible, but also correct formula to cover the full range as intended and documented)
-updates to changes/revision files
-delete outdated files
-remove outdated support header files for borland, mingw and watcom compilers. if support is needed for any of the above, it would be better to start a fresh header as the old ones have not been used since 3.6
-remove old 4BPP toolbar icons as 16-color mode support isn't really relevant anymore
-update about bitmap to remove explicit URL's and add support to about window code to make some areas act as hyperlinks
-adds Mac xcode project and support files, still some compile errors due to misconfigured paths etc.
