Installer: remove File/@Name attributes.

File/@Name attributes are redundant, since they default to the filename
of the path specified in File/@Source.
Installer: remove Component/@Id attributes.

If @Id is missing, it gets auto-generated from the name of the File
specified as KeyPath, and that's good enough for me.
Regenerate component GUIDs.

I don't want the component GUIDs for Qt in ore-infinium to match
what I use in Qt for KDE.
Install ore-infinium.exe.

Still doesn't work since there's lots of more missing files.