SCons and D

My changes to SCons to support gdc and ldc2 as well as dmd, and to
integrate D as a peer to C++ appear to have been merged into SCons
mainline/default. This means it is time to retire the SCons_D_Tooling
repository. Well, not so much retire as take out and terminate with
severe prejudice – due to the merging strategy I had been using, the
repository has no future.

If I can get everyone using my fork of SCons to switch to using the
SCons mainline, I'd appreciate it.

Thanks.