Fix: OutJPG: prevent exit() from being called when error is raised within jpeglib
Fix: OutPNG: prevent libpng calling exit()
Fix: OutJPG: correct error message in the exeption object
Fix: example was too old
SConstruct: using git instead of Mercurial
.gitignore: more generated files
Fix: Consider NaN
Merge branch 'master' of ssh://hsc-repo/home/gituser/repositories/fitsthumb