Changes by: Yegor Bryukhov (ybryukhov at gmail.com)
Date: 2008-07-16 08:55:43 -0700 (Wed, 16 Jul 2008)
Revision: 13128
Log message:

      forgot to add these files a couple of days ago

Changes  Path(relative to metaprl/theories/s4lp)
Added hilbert_logic.ml
Added hilbert_logic.mli