Threads (post sub-sections)

[Throne3d]

Threads, as seen in the various Demon Cam sandboxes, should be implemented. Preferably with the following features:

• Visibilities for individual threads in a post
• Handled by the scraper appropriately
• Content warnings for individual threads (see issue Content warnings for sections rather than whole posts #19)
• A clearer name? ('Threads' is now often used for the 'post' model.)

[Throne3d]

Pedro had a suggestion for implementation on the forums.

[Throne3d]

This might in fact not be necessary. So far most threads have been either compressed into a single thread or separated and had their titles prefixed.

[Throne3d]

Mostly handled by the scraper now.