Closes GH-81.
This adds proper support for presets in **remark-lint**.
This is a big one: **remark-lint** no longer does anything
without you telling it to.
* Update internals, docs, examples, to turn `reset`
on by default;
* Refactor project to monorepo;
* Move library to `./packages/remark-lint`;
* Add the following preset packages:
* `remark-preset-lint-consistent`;
* `remark-preset-lint-recommended`;
* `remark-preset-lint-legacy`.
If you’re using the CLI, please add one or more of these presets
to your configuration file.
On the API, note that presets are node modules, so it’s possible
to `require` them as well.