[cmucl-imp] New branches

[Raymond Toy]

FYI,

I pushed up a couple of new branches.  The branch file-attribute
contains Douglas' contribution which adds a new external format called
:file-attribute that will determines the actual external format to use
by looking for an emacs -*- mode line near the beginning of the file. 
The encoding is determined by looking for "encoding: <encoding>;" and
<encoding> is used for the external-format.

The other branch is tcall-convention for Helmut's tcall-convention patch
for calling functions with unboxed arguments.

Ray