Merge pull request #2 from ckeditor/t/1

Feature: The first implementation of the decoupled editor. Closes #1. Closes ckeditor/ckeditor5#873.

CONTRIBUTING.md

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+Contributing
+========================================
+
+Information about contributing can be found on the following page: <https://github.com/ckeditor/ckeditor5/blob/master/CONTRIBUTING.md>.

LICENSE.md

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+Software License Agreement
+==========================
+
+**Decoupled Editor** – https://github.com/ckeditor/ckeditor5-editor-decoupled <br>
+Copyright (c) 2003-2018, [CKSource](http://cksource.com) Frederico Knabben. All rights reserved.
+
+Licensed under the terms of any of the following licenses at your choice:
+
+* [GNU General Public License Version 2 or later (the "GPL")](http://www.gnu.org/licenses/gpl.html)
+* [GNU Lesser General Public License Version 2.1 or later (the "LGPL")](http://www.gnu.org/licenses/lgpl.html)
+* [Mozilla Public License Version 1.1 or later (the "MPL")](http://www.mozilla.org/MPL/MPL-1.1.html)
+
+You are not required to, but if you want to explicitly declare the license you have chosen to be bound to when using, reproducing, modifying and distributing this software, just include a text file titled "legal.txt" in your version of this software, indicating your license choice. In any case, your choice will not restrict any recipient of your version of this software to use, reproduce, modify and distribute this software under any of the above licenses.
+
+Sources of Intellectual Property Included in CKEditor
+-----------------------------------------------------
+
+Where not otherwise indicated, all CKEditor content is authored by CKSource engineers and consists of CKSource-owned intellectual property. In some specific instances, CKEditor will incorporate work done by developers outside of CKSource with their express permission.
+
+Trademarks
+----------
+
+**CKEditor** is a trademark of [CKSource](http://cksource.com) Frederico Knabben. All other brand and product names are trademarks, registered trademarks or service marks of their respective holders.

README.md

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+CKEditor 5 decoupled editor implementation
+========================================
+
+[![Join the chat at https://gitter.im/ckeditor/ckeditor5](https://badges.gitter.im/ckeditor/ckeditor5.svg)](https://gitter.im/ckeditor/ckeditor5?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![npm version](https://badge.fury.io/js/%40ckeditor%2Fckeditor5-editor-decoupled.svg)](https://www.npmjs.com/package/@ckeditor/ckeditor5-editor-decoupled)
+[![Build Status](https://travis-ci.org/ckeditor/ckeditor5-editor-decoupled.svg?branch=master)](https://travis-ci.org/ckeditor/ckeditor5-editor-decoupled)
+[![BrowserStack Status](https://www.browserstack.com/automate/badge.svg?badge_key=d3hvenZqQVZERFQ5d09FWXdyT0ozVXhLaVltRFRjTTUyZGpvQWNmWVhUUT0tLUZqNlJ1YWRUd0RvdEVOaEptM1B2Q0E9PQ==--c9d3dee40b9b4471ff3fb516d9ecf8d09292c7e0)](https://www.browserstack.com/automate/public-build/d3hvenZqQVZERFQ5d09FWXdyT0ozVXhLaVltRFRjTTUyZGpvQWNmWVhUUT0tLUZqNlJ1YWRUd0RvdEVOaEptM1B2Q0E9PQ==--c9d3dee40b9b4471ff3fb516d9ecf8d09292c7e0)
+[![Coverage Status](https://coveralls.io/repos/github/ckeditor/ckeditor5-editor-decoupled/badge.svg?branch=master)](https://coveralls.io/github/ckeditor/ckeditor5-editor-decoupled?branch=master)
+<br>
+[![Dependency Status](https://david-dm.org/ckeditor/ckeditor5-editor-decoupled/status.svg)](https://david-dm.org/ckeditor/ckeditor5-editor-decoupled)
+[![devDependency Status](https://david-dm.org/ckeditor/ckeditor5-editor-decoupled/dev-status.svg)](https://david-dm.org/ckeditor/ckeditor5-editor-decoupled?type=dev)
+
+The decoupled editor implementation for CKEditor 5.
+
+This package contains the [`DecoupledEditor`](https://ckeditor5.github.io/docs/nightly/ckeditor5/latest/api/module_editor-decoupled_decouplededitor-DecoupledEditor.html) class. Follow there to learn more about this type of editor and how to initialize it.
+
+This package contains the source version of the decoupled editor. This editor implementation is also available in the [document build](https://www.npmjs.com/package/@ckeditor/ckeditor5-build-decoupled-document). Read more about [CKEditor 5 Builds](https://ckeditor5.github.io/docs/nightly/ckeditor5/latest/builds/index.html).
+
+## Documentation
+
+See the [`@ckeditor/ckeditor5-editor-decoupled` package](https://ckeditor5.github.io/docs/nightly/ckeditor5/latest/api/editor-decoupled.html) page in [CKEditor 5 documentation](https://ckeditor5.github.io/docs/nightly/ckeditor5/latest/).
+
+## License
+
+Licensed under the GPL, LGPL and MPL licenses, at your choice. For full details about the license, please check the `LICENSE.md` file.

docs/api/editor-decoupled.md

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+---
+category: api-reference
+---
+
+# CKEditor 5 decoupled editor implementation
+
+[![npm version](https://badge.fury.io/js/%40ckeditor%2Fckeditor5-editor-decoupled.svg)](https://www.npmjs.com/package/@ckeditor/ckeditor5-editor-decoupled)
+
+The decoupled editor implementation for CKEditor 5. See the {@link examples/builds/document-editor demo}.
+
+## Documentation
+
+This package contains the {@link module:editor-decoupled/decouplededitor~DecoupledEditor} class. Follow there to learn more about this type of editor and how to initialize it.
+
+This package contains the source version of the decoupled editor. This editor implementation is also available in the [decoupled build](https://www.npmjs.com/package/@ckeditor/ckeditor5-build-decoupled). Read more about {@link builds/index CKEditor 5 Builds}.
+
+## Installation
+
+```bash
+npm install --save @ckeditor/ckeditor5-editor-decoupled
+```
+
+## Contribute
+
+The source code of this package is available on GitHub in https://github.com/ckeditor/ckeditor5-editor-decoupled.
+
+## External links
+
+* [`@ckeditor/ckeditor5-editor-decoupled` on npm](https://www.npmjs.com/package/@ckeditor/ckeditor5-editor-decoupled)
+* [`ckeditor/ckeditor5-editor-decoupled` on GitHub](https://github.com/ckeditor/ckeditor5-editor-decoupled)
+* [Issue tracker](https://github.com/ckeditor/ckeditor5-editor-decoupled/issues)
+* [Changelog](https://github.com/ckeditor/ckeditor5-editor-decoupled/blob/master/CHANGELOG.md)

docs/framework/guides/document-editor.md

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+---
+category: framework-ui
+order: 30
+---
+
+# Document editor
+
+TODO

package.json

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+{
+  "name": "@ckeditor/ckeditor5-editor-decoupled",
+  "version": "0.0.1",
+  "description": "Decoupled editor implementation for CKEditor 5.",
+  "keywords": [
+    "ckeditor5",
+    "ckeditor5-editor"
+  ],
+  "dependencies": {
+    "@ckeditor/ckeditor5-core": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-engine": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-theme-lark": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-ui": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-utils": "^1.0.0-alpha.2"
+  },
+  "devDependencies": {
+    "@ckeditor/ckeditor5-basic-styles": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-enter": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-heading": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-paragraph": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-typing": "^1.0.0-alpha.2",
+    "@ckeditor/ckeditor5-undo": "^1.0.0-alpha.2",
+    "eslint": "^4.15.0",
+    "eslint-config-ckeditor5": "^1.0.7",
+    "husky": "^0.14.3",
+    "lint-staged": "^6.0.0"
+  },
+  "engines": {
+    "node": ">=6.0.0",
+    "npm": ">=3.0.0"
+  },
+  "author": "CKSource (http://cksource.com/)",
+  "license": "(GPL-2.0 OR LGPL-2.1 OR MPL-1.1)",
+  "homepage": "https://ckeditor5.github.io",
+  "bugs": "https://github.com/ckeditor/ckeditor5-editor-decoupled/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/ckeditor/ckeditor5-editor-decoupled.git"
+  },
+  "files": [
+    "lang",
+    "src",
+    "theme"
+  ],
+  "scripts": {
+    "lint": "eslint --quiet '**/*.js'",
+    "precommit": "lint-staged"
+  },
+  "lint-staged": {
+    "**/*.js": [
+      "eslint --quiet"
+    ]
+  },
+  "eslintIgnore": [
+    "src/lib/**",
+    "packages/**"
+  ]
+}