Merge branch 'master' of github.com:babel/babel

t push

packages/babel-plugin-transform-es2015-constants/README.md

@@ -33,3 +33,7 @@ require("babel-core").transform("code", {
   plugins: ["transform-es2015-constants"]
 });
 ```
+
+## Note
+
+This transform on its own will compile `const` to `let`. If you need it to compile down to `var` then you must also install and enable [`transform-es2015-block-scoping`](../babel-plugin-transform-es2015-block-scoping).

packages/babel-preset-stage-0/README.md

@@ -0,0 +1,35 @@
+# babel-preset-stage-0
+
+> Babel preset for stage 0 plugins.
+
+## Install
+
+```sh
+$ npm install --save-dev babel-preset-stage-0
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "presets": ["stage-0"]
+}
+```
+
+### Via CLI
+
+```sh
+$ babel script.js --preset stage-0
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  presets: ["stage-0"]
+});
+```

packages/babel-preset-stage-1/README.md

@@ -0,0 +1,35 @@
+# babel-preset-stage-1
+
+> Babel preset for stage 1 plugins.
+
+## Install
+
+```sh
+$ npm install --save-dev babel-preset-stage-1
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "presets": ["stage-1"]
+}
+```
+
+### Via CLI
+
+```sh
+$ babel script.js --preset stage-1
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  presets: ["stage-1"]
+});
+```

packages/babel-preset-stage-2/README.md

@@ -0,0 +1,35 @@
+# babel-preset-stage-2
+
+> Babel preset for stage 2 plugins.
+
+## Install
+
+```sh
+$ npm install --save-dev babel-preset-stage-2
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "presets": ["stage-2"]
+}
+```
+
+### Via CLI
+
+```sh
+$ babel script.js --preset stage-2
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  presets: ["stage-2"]
+});
+```

packages/babel-preset-stage-3/README.md

@@ -0,0 +1,35 @@
+# babel-preset-stage-3
+
+> Babel preset for stage 3 plugins.
+
+## Install
+
+```sh
+$ npm install --save-dev babel-preset-stage-3
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "presets": ["stage-3"]
+}
+```
+
+### Via CLI
+
+```sh
+$ babel script.js --preset stage-3
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  presets: ["stage-3"]
+});
+```