Rip out hadrian subtree
Sadly subtrees haven't worked quite as well as we would have liked for developers. See Hadrian #440.
hadrian/.ghci
deleted
100644 → 0
hadrian/.gitignore
deleted
100644 → 0
hadrian/.travis.yml
deleted
100644 → 0
hadrian/LICENSE
deleted
100644 → 0
hadrian/README.md
deleted
100644 → 0
hadrian/appveyor.yml
deleted
100644 → 0
hadrian/build.bat
deleted
100644 → 0
hadrian/build.sh
deleted
100755 → 0