fix folder_page template

add default title for folders

modify EXIF.py to use mmap in the hope of slightly better improvements with less syscalls

implement simple stat caching using lazy_load for filesystem

fix LazyProperty to not inherit from property, so as to act as a non-data descriptor, which can then be overriden by per-instance __dict__ values

fix Thumbnail.stale/File.older_than behaviour

slightly reoriganize function structure in commands.main

fix File.newer_than/File.older_than to correctly handle None

move Command exception handling into command.py, and handle KeyboardInterrupt

change Image.update to unconditionally update the thumb/preview

fix Folder.subdirs

add task_threads config setting

initial implementation of threaded rendering of a folder's images

implement up-to-date checking for commands.main, and add --force-update option

remove obsolete req.py

move thumbnail rendering from render.py to thumbnail.py, and implement staleness checking for Images, plus index_images for Folder

change utils.LazyProperty to store the cached value using obj.__dict__

fix templates to show thumbnails on folder template

fix Gallery.stylesheet to actually copy it into place

misc. format.py formatting bugs

fix html to have a separate Container type, but also special-case tuples, lists and genexps

fix filesystem.Path.path_segments and add some doctests

fix html/templates to use a Container type (inherited by Tag) for flat lists of tags

misc. fixes, it runs now, but HTML output is corrupt (no flattening)

misc. fixes

fix utils.LazyProperty

remove old templates

misc. stuff in gallery.py utils.py

use new command/gallery stuff in main.py

remove old log.py module