Visual update of installation screen

Part of my effort is to update a few of the visual styles that look incomplete. I have only been able to spend a few on this, but did figure out a few things we could optimize in this screen.

This does not solve any usability issues, therefor it should be considered a minor issue - it does however have a big impact on the "first impression" that people get.

I have made a number of large changes:

• Overall updated the design to be more fresh, and less gray. It seems that the branding we use in the admin interface, is more focused around the bright blue - I made this a more prominent element.
• Aligned the page title with the logo, this because originally the page title looked like it was hanging above. Using a bar you create a visual landmark where one can orientate from.
• Changed the design for the wizard, to bring them out a little more.
• Did minor touches to the button, this could probably be done theme-wide. Removing the white border, which made it look pixelated.

I have also attached several options for the background, I prefer option 1 because it matches best with the overall color scheme. I have only spend a few on this, I can imagine a graphic designer could make a more intense and beautiful background pattern.

As always the source files are attached for reference.