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Ensure that two different composites of the same type can be displayed in the same view, by suffixing their variables/IDs with something random

Conflicts:

	htdocs/lib/upgrade.php

Make blocks with more than one artefact in them (as what happens with listself) be expanded to have all of them displayed individually. This fixes the last major problem with migrating view templates.

 * Up the memory limit to 64M. The 16M limit was hit when migrating a 600 view Mahara, so I don't imagine 64M will be hit in the wild
 * Move the installation of the blockinstancecommit event to before the view migration. This is so that such events can be fired safely by blockinstances that are being committed
 * Install _all_ of the blocktypes when upgrading

Only make sure about resume artefacts being in the block instance if the instance is _actually_ an entireresume blocktype.

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.

Also gave them the icon that they should have.

Conflicts:

	htdocs/lib/version.php

One suggestion for improvement is to have several layout templates and allow the user to pick one.

For now, it makes sure that all resume fields a user has are displayed in the block at all times (excluding goals and skills)

Ensure that, when committed, resume fields tell any 'entireresume' blocktypes in views the user owns that they have been created.

This ensures that when a user adds a resume field, it's instantly visible in their entireresume blocks.

Install the 'blockinstancecommit' event. Make sure that events from blocktypes are installed correctly.

Only check blocktype stuff if it is installed. This prevents the admin section from crashing out when you upgrade to 0.9

Namely, when a block doesn't migrate properly.

Also reduced the size of resized images in views somewhat to work better on smaller screens.

Remove the title on filedownload blocks with more than one file in them. Correctly set the profile icon for profileinfo blocks. The general template now mostly migrates.

- Fix the name of the preinst script
- Make all scripts executable
- Make the common-functions POSIX-compliant
- Use the default shell instead of hard-coding bash