Nexus 1.5 Beta

This new version brings Nexus to its final release state and adds a few features that have been requested and should round off the edges on an already powerful file management package. These features include:

- Administrators can send email to one or more groups of users
- Any registered user can send email to another user from within Nexus without either party knowing the other's email address
- Allow self-registration (optional - enabled through global settings)