New Aegir login screen

In addition to changing the logo and colors in the login screen, the welcome message was also changed to:

Aegir CMS 1.0.2 beta is an administrative interface for the Midgard Open Source Content Management System (1.5.0/SG). See the Credits and License page for more information

Aegir CMS and Midgard are free software available under the GNU licenses.

Thanks to Tony Lee for designing the new login image!