Now it does more too - like shortening the title of any files in the folder listing. This makes the listing easier to read when the block is placed in a narrow column.

The name is largely irrelevant as it's only the creator of the file.

Signed-off-by: Andrew McMillan

Displays a folder and its contents. Sadly, the artefact chooser doesn't make it very easy to sort the results in a 'folder and its children' type way. Also sadly, files added to folders will not be available in the view for up to a minute, until the artefact parent cache is rebuilt. This problem is fixable later in the same way that it was for the resume field stuff, but the work isn't worth it right now.

Changed all requires.
Also removed not used json/renderartefact.php

Implemented get_artefacts in the BlockType parent class, so that all children don't have to implement it.

The one exception thus far is the Profile Information blocktype, which needs to add the 'profileicon' field.

 * The element is set in artefactchooser_element()
 * artefactchooser_get_element_data() works out the blog the artefact is in, as well as a shortening for the description
 * artefactchooser_get_sort_order() sorts the blogposts by what blog they are in, then by their creation time descending

Added blogpost blocktype, first cut. The title of the blogpost is used for the title of any blockinstance made.

Currently, the artefact chooser for choosing a blogpost is stuffed, because the artefact chooser is still assuming that images and files are what is in it.