Move image resources and related files to their own directory

Add an "sdk" suffix at the same time to make room for upcoming Git
installer resources.

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Enable the rasterize scripts to create both SDK and Git installer images

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Copy over Git installer image resources from msysgit

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Move the SDK installer to a shared directory with the Git installer

Add an "sdk" suffix at the same time to make room for the upcoming Git
installer.

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Split the lists of required and recommended packages into separate files

This way these lists can be easily shared by the SDK and Git installers.

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Add a basic installer for Git for Windows based on the SDK

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>