[cmucl-imp] Snapshot 2016-06

[Raymond Toy]

The 2016-06 snapshot has been tagged and binaries will be uploaded
soon.

Major changes:

o Ancient bug in COERCE fixed where coercing a double-float to a float
  would produce a single-float result instead of returning the
  original number (since it's already of type float).
o The binding stack and control stack are now mapped into memory
  wherever this is space instead of being mapped at fixed locations.

--
Ray