Release DENormGen 1.6

Version 1.6
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- improved quality of generated normal map
- modified the algorithm to produce nearly optimal normal maps without
requiring to set up complex cages ( backface limitation check )
- added a little hack to the export script to avoid waiting very long
for exporting ( normals/tangents not required on highres while exporting )
- adjusted export script to work with newer blender versions

Sources and Unix Build under the Files section. No Windows build right now since the windows system is broken.