[Marketing] Logo resources for Windows Installers

Hi all,

I've used the OSGeo logo in some resources for the MapGuide Open Source Windows installer. These include:

- Large BMP for "welcome" page of installer
- Small BMP for intermediate pages of installer
- Multi-resolution ICO file for setup exe, msi, shortcuts, etc

Not sure if you're interested in copying these into the logo SVN and sharing them on the logo page, but if you want to please download them and go ahead: