Start using testSS to check Maple output quality
Beautify debugging output slightly
Using Haskell lists instead of own type List_

- All interpretations done except Disintegrate
Merge conflicts fixed
Make norm a more reasonable example program
Merge branch 'master' of github.com:hakaru-dev/hakaru
Fix typo
Make "normalize" provide lifting operation
Fix typo
Another try at gibbsProposal and normalize
Adding Gibbs proposal test