Uses a new helper class to do the gruntwork, and a lot of preg_replace stuff. It's a little bit hacky perhaps, but it's the simplest thing that could possibly work.

Not sure how people were downloading attachments from blogposts in view before this.

This patch ditches use of the tablerenderer in favour of just showing the most recent posts, and linking off to view/artefact.php for the rest. I added pagination to assist that.

Needs cleanup for sure, but for now it's there and it works.

I've not touched some strange things I saw while doing this, such as the 'resumefive' and 'resumefour' classes on the tables. I can only assume they're used somewhere, although grep gives no clues.

now each plugin can say whether it can be disabled or not. defaults to true

NEEDS TESTING!!!

The only places in Mahara that don't want this are upgrades, which I
changed as well.