* First docs.
* Docs requirements.
* Add auto-generated gallery and fix two bugs in the driver.
* Gallery: link directly to github.
* Tag examples as Haskell code.
* Update starting guide and redirect gallery links to master branch.
* Include link to readthedocs.
Former-commit-id: 90e846e5001deadd6c921f611c69b3a4210db30d