Adds initial typescript support

BREAKING CHANGE: Renovate is now distributed as a "built" package on npmjs, using `dist/` instead of `lib/`. For nearly everyone, it should still just work though.

Closes #2609

Docker's build process doesn't allow you to ADD or COPY files from outside the directory tree. e.g. `ADD ../package.json .` is forbidden. The only option I can see is to move it and `hooks` back into the project root.