Huge performance improvements in Tracker Web Server v1.5

A large part of the core code base in Tracker Web Server has been rewritten resulting in speed increases of 50x for some operations. The whole website feels much, much "snappier" especially with larger client sites.

In addition, new database optimisations within the Asbestos Tracker databases have helped to make the Tracker Web Server experience a much slicker one.

Contact the office if you want the upgrade which also includes a new facility for users to be able to email the contents of library folders back to themselves (rather than having to download each document separately).