Upgrade htmlpurifier to 4.5.0

[Aaron Wells]

We're currently on 4.4.0.

[Aaron Wells (u-aaronw)]

https://reviews.mahara.org/2672

There are a lot of whitespace changes in this commit. That's because the htmlpurifier library has Windows line endings on every file. For some reason our 4.4.0 installation had those Windows line endings converted to Unix line endings. In keeping with the principle that it's best to avoid unnecessary changes to external libraries, I'm leaving the Windows line endings intact this time.

[Son Nguyen (ngson2000)]

Hi Aaron;

Any idea of testing this patch?

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/2672
Committed: http://gitorious.org/mahara/mahara/commit/4a5d506a90b28b724ce3d9af35e58846a6739a55
Submitter: Son Nguyen (<email address hidden>)
Branch: master

commit 4a5d506a90b28b724ce3d9af35e58846a6739a55
Author: Aaron Wells <email address hidden>
Date: Thu Oct 31 16:39:14 2013 +1300

Upgrading htmlpurifier to 4.5.0

Bug 1246573

Change-Id: Ibe27bb64fefb2739214f1f00877a4b4a7a5a3e11

[Son Nguyen (ngson2000)]

I have tested clean_html with html blocks

1. normal and short html page
2. long html page. Error raised if it is too big > 600KB
3. html page with malicious code