meillo@0: TODO:
meillo@0: 
meillo@0: - security checks
meillo@24: 
meillo@7: - navigation in pic pages (really?)
meillo@24: 
meillo@5: - verify that input files are images
meillo@24: 	convert doesnt always return an error code if it is no supported image type
meillo@24: 	so is the problem with gimp's xcf format
meillo@24: 
meillo@16: - verify picture and thumbnail sizes are numbers