Stas Boukarev authored Jan 12, 2013 and Luís Oliveira committed Feb 21, 2013

Fixes issue with ABCL not finding things like "strcmp" when no libraries
are loaded.

easye authored Oct 29, 2012 and Luís Oliveira committed Nov 04, 2012

The interactive restart when reloading callbacks is no longer needed.

A callable function pointer is now returned by CALLBACK and
GET-CALLBACK, which wasn't the case previously.

Now down to 25 failing tests!

Callbacks "automacro-ly" now get a translation layer to convert back
from native types to ones which ABCL expects.  This translation is
currently a work in progress, as not all cases are covered correctly.

(Stas Boukarev) MAKE-FUNCTION-POINTER typo.

Refactored to remove compile warnings about MAKE-IMMEDIATE-OBJECT.

CFFI-SYS::%LOAD-FOREIGN-LIBRARY tries harder to figure out which
library to load.

Docstrings added.

Patch courtesy of Mark Evenson.

Patch courtesy of Mark Evenson.

Bug reported by Anton Vodonosov.