Adopt ML-style syntax for case expressions and use freed up "||" for bitwise-or. See issue #24.

Removed trailing whitespace from all .sml and .sig files.

This affects over 900 files and was done using emacs's delete-trailing-whitespace
function in batch mode. Building the system with Poly/ML and Moscow ML seems to
work, so I'm hoping these changes don't break anything. Please complain if
they do!

Attempt to tidy up (fix) EmitML and finish off the transition that Scott
started. EmitML has been moved to the end of the build sequence. "Hooks"
have been eliminated and all EmitML related stuff has been removed from the
various theory directories. All code for generating ML/Caml is now
self-contained within src/emit. I've not tested the generated Caml code but
the SML seems to build fine.

The directories:

src/theoryML
src/theoryOcaml
src/emitScript

have been replaced by

src/emit/theories/ML
src/emit/theories/Caml
src/emit/theories

Minor changes.

Remove unused stuff.

Renamed bsubst to update (as it is in v4T).

Moved a few definitions/theorems to better homes.

Fixed broken proofs - following addition of WORD_ss to srw_ss().

Also replaced %% with '.

Turn off bool['a] notation when using emitML.

examples/elliptic/arm -> examples/ARM/v4
examples/arm6 -> examples/ARM/arm6-verification