The headers need some attention

[Frank Benoit]

The dmd generated headers did never work in practise. These error 
reports show multiple case were they fail.

http://d.puremagic.com/issues/show_bug.cgi?id=1133
http://d.puremagic.com/issues/show_bug.cgi?id=1963

DSSS is working around bugs in header generation, by simply copying the 
source files and rename it to .di

Will this work in every case?