Add docs and update README

Author: kelunik

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "docs/.shared"]
+	path = docs/.shared
+	url = https://github.com/amphp/website-shared

README.md

@@ -1,17 +1,28 @@
 # windows-registry
 
-![Unstable](https://img.shields.io/badge/api-unstable-orange.svg?style=flat-square)
+![Stable](https://img.shields.io/badge/v0.3-stable-green.svg?style=flat-square)
 ![License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)
 
-`amphp/windows-registry` provides asynchronous access to the Windows Registry based on the [`amp`](https://github.com/amphp/amp)
-concurrency framework.
+`amphp/windows-registry` provides asynchronous access to the Windows Registry for [Amp](https://github.com/amphp/amp).
 
-**Required PHP Version**
+## Installation
 
-- PHP 5.5+
+```bash
+composer require amphp/windows-registry
+```
 
-**Installation**
+## Documentation
 
-```bash
-$ composer require amphp/windows-registry
-```
+Documentation is bundled within this repository in the [`./docs`](./docs) directory.
+
+## Versioning
+
+`amphp/windows-registry` follows the [semver](http://semver.org/) semantic versioning specification like all other `amphp` packages.
+
+## Security
+
+If you discover any security related issues, please email [`me@kelunik.com`](mailto:me@kelunik.com) instead of using the issue tracker.
+
+## License
+
+The MIT License (MIT). Please see [`LICENSE`](./LICENSE) for more information.

docs/.gitignore

@@ -0,0 +1,4 @@
+.bundle
+_site
+vendor
+Gemfile.lock

docs/.shared

@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+gem "github-pages"
+gem "kramdown"
+gem "jekyll-github-metadata"
+gem "jekyll-relative-links"

docs/Gemfile

@@ -0,0 +1,23 @@
+kramdown:
+  input: GFM
+  toc_levels: 2..3
+
+baseurl: "/windows-registry"
+layouts_dir: ".shared/layout"
+
+exclude: ["Gemfile", "Gemfile.lock", "README.md", "vendor"]
+include: [".shared"]
+
+repository: amphp/windows-registry
+gems:
+ - "jekyll-github-metadata"
+ - "jekyll-relative-links"
+
+defaults:
+ - scope:
+     path: ""
+     type: "pages"
+   values:
+     layout: "docs"
+
+asset_path: "/windows-registry/.shared/asset"

docs/_config.yml

@@ -0,0 +1,17 @@
+---
+title: Windows Registry
+permalink: /
+---
+`amphp/windows-registry` is a small helper package to ease reading the Windows registry. This might be necessary to access system settings such as the default DNS server.
+
+## Installation
+
+```
+composer require amphp/windows-registry
+```
+
+## Usage
+
+`WindowsRegistry` has the two methods `listKeys` and `read`.
+
+`listKeys` fetches all sub-keys of one key. `read` reads the value of the key. Note that `read` doesn't convert any values and returns them as they're printed by `reg query %s`.