Behaviour of pack/unpack changed in PHP 5.5 and caused Archive_Tar to break.
See: http://php.net/manual/en/migration55.changed-functions.php
and http://pear.php.net/bugs/bug.php?id=19746
and easy-install for GeoLiteCity.
Notes:
* Added new PEAR lib Archive_Tar and new Unzip implmentations for .tar.gz, .tar.bz2 & .gz files.
* Modified Http class to allow use of Range HTTP header.
* Added ability to download file in chunks to Http class.
* Moved GeoIP admin page styles to separate CSS file.
* Allowed monthly scheduled tasks to specify day of week to run on.
git-svn-id: http://dev.piwik.org/svn/trunk@7550 59fd770c-687e-43c8-a1e3-f5a4ff64c105