[cmucl-imp] Happy New Year with snapshot-2013-01

[Raymond Toy]

Happy New Year!

Yet another month and year has passed and so we have the first
snapshot of 2013.  Binaries will be uploaded soon.

Some notable changes:

 Fixed tickets:
   Ticket 66: replace on simple strings
   Ticket 67: deftransform for replace is unsafe
   Ticket 68: bit-bash-copy can't handle very large objects.

 :ALIEN-CALLBACK added to *FEATURES* for platforms (x86, sparc, ppc)
 that support alien callbacks.

Ray