add David's Keccak implementation
Only print `Loading` when the module is going to be loaded

  Looks like we were re-loading everything afterall!  This closes #10
Merge branch 'master' into devel
add travis.yml
install the Cabal library before starting the Travis build
disable email notifications for travis
fix expected output for tests after fix in #10
fix #67

The python side of the notebook needed to be updated to expect a
.cabal-sandbox rather than cabal-dev sandbox. Also added a -fnotebook
flag to the cabal file to build the Haskell side of it.
add makefile target for cryptolnb executable
Merge branch 'devel'

This was the branch I originally set up for git flow, but we're moving
to production=release and develop=master, so this branch is obsolete.