Added readme.

readme.md

@@ -0,0 +1,53 @@
+cleanup-package-json
+=====================
+
+## Get started
+```sh
+$ npm install cleanup-package-json -g
+```
+
+## Features
+- Removes unnecessary parts of `package.json`.
+
+## Usage
+```sh
+$ scss-bundle -h
+```
+
+### Examples
+_Default config:_
+
+Default config name is `cpj.config.json`.
+
+```sh
+$ cleanup-package-json
+```
+
+_With custom name config:_
+```sh
+$ cleanup-package-json -c custom-config.json
+```
+
+## Config example
+```json
+{
+    "include": {
+        "scripts": ["test"]
+    },
+    "exclude": {
+        "keywords": ["*"],
+        "scripts": ["*"]
+    },
+    "backup": true
+}
+```
+
+| Argument     | Type                           | Default | Description                                               |
+|--------------|--------------------------------|---------|-----------------------------------------------------------|
+| include      | [arg: string]: Array\<string\> | none    | Parts that must be included.                              |
+| exclude      | [arg: string]: Array\<string\> | none    | Parts that will be removed (Lower priority then include). |
+| backup       | boolean                        | false   | Backups `package.json` to `package.bak.json`.             |
+| writeChanges | boolean                        | true    | Writes changes to `package.json`.                         |
+
+## License
+Released under the [PGL-3.0 license](LICENSE).