This change makes it possible to specify just the name of a post processor
in the "postprocessors" list instead of a dict with all of its options.
The options for it will then be taken from inside the "postprocessor"
block similar to "extractor", "downloader", or "output" blocks.
This makes it possible to for example override the default settings for
--write-metadata by specifying a custom "metadata" block, or to set a
custom post processor block ("cbz") and then use it by referencing just
its name in "postprocessors" lists.
{
"postprocessor":
{
"metadata": {
"name": "metadata",
"event": "post",
"filename": "{tweet_id|post_id|id}.json"
},
"cbz": {
"name" : "zip",
"compression": "store",
"extension" : "cbz"
}
}
}