FIX simplify_deptree() was not recursing down
Merge pull request #17 from moreymat/generate-all-instances

FIX simplify_deptree() was not recursing down
FIX: corenlp trees with scrambled leaves

I was unthinkingly iterating over a dictionary, which of course
comes out in whatever order is efficient for storing a dictionary,
effectively scrambling the leaves
Merge branch 'master' into conll-format