Thumbnails

I've looked into thumbnails plugin written by Vincent Bernat, and rewrote it in the way proposed in mailing list https://groups.google.com/group/hyde-dev/msg/81354b98c959a1b5

Now you can set optional default values for thumbnailing options in site.yaml:

    thumbnails:
      width: 100
      height: 120
      prefix: thumb_

And then define actual images to thumbnail using meta plugin, for example in nodemeta.yaml:

    thumbnails:
      - width: 50
        prefix: thumbs1_
        include:
        - '*.png'
        - '*.jpg'

Notice that thumbnails in the metadata is a list of option sets, this way you can make thumbnails with different sizes from different images or several thumbnails from single image, for example:

    thumbnails:
      - width: 50
        prefix: thumbs1_
        include:
        - '*.png'
        - '*.jpg'
      - height: 100
        prefix: thumbs2_
        include:
        - '*.png'
        - '*.jpg'

which means - make from every picture two thumbnails with different prefixes and sizes