Add decls
Stub bodies
Forget done.
Tests failing
Test passing.
Merge branch 'master' into Permutations
Readying.
Moar tests.
Linting
After eggrobin's review.
After eggrobin's 2nd review.
Just say no to const madness.
Merge pull request #61 from pleroy/Permutations

Missing functionality in permutationn