Sync wrappers.
PHP: Always use by default version 5.5
Drupal 8 requires read permissions in sites/all

Otherwise it will yell with errors like this:
[23-Dec-2014 00:03:25 UTC] Uncaught PHP Exception UnexpectedValueException: "RecursiveDirectoryIterator::__construct(/var/aegir/platforms/drupal-8.0.0-beta4/sites/all): failed to open dir: Permission denied" at /var/aegir/platforms/drupal-8.0.0-beta4/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php line 339
Fix typo.
Drupal 8.0.0-b4
Symlinks directories expected by Drush/Aegir in D8 root.
Test Aegir 3.x with in-vanilla / up-vanilla mode.
Update symlinks for Drupal 8 core.
Git 2.2.1 (if installed from sources)
Fix default permissions.
Nginx 1.7.9
OpenChurch 2.1-b2
Composer install requires php already installed.
Use correct _SQL_CONNECT value.
Test 8x_37f13f379a1f
PHP: Allow to define version to install and use on command line - fixes #536
Docs update.
Write _PHP_SINGLE_INSTALL in /root/.barracuda.cnf
Redis 2.8.19
Improve web wrapper.