Re: implementation of the decision to remove external frames

I made a small change to remove mention of external frames from Core.

Michael Kifer wrote:
> I made the needed changes in BLD, DTB, and FLD.
>
> In the first two, I removed external frames and changed the appendix in DTB.
>
> In FLD, I added two-argument External's so that  ATOMIC
> externals could be supported (in other dialects). The 1-argument External was
> restricted to match BLD, and it is now considered to be a shorthand for the
> 2-argument External. (BLD does not allow 2-arg externals.)
>
> michael
>
>