Change licence to very similar MIT, and improve README

Author: stephencookdev

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Stephen Cook <stephen@stephencookdev.co.uk>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -16,19 +16,23 @@ This plugin measures your webpack build speed, giving an output like this:
 ## Install
 
 ```bash
-npm install --save speed-measure-webpack-plugin
+npm install --save-dev speed-measure-webpack-plugin
 ```
 
 or
 
 ```bash
-yarn add speed-measure-webpack-plugin
+yarn add -D speed-measure-webpack-plugin
 ```
 
 ## Migrating
 
 SMP follows [semver](https://semver.org/). If upgrading a major version, you can consult [the migration guide](./migration.md).
 
+## Requirements
+
+SMP requires at least Node v6.
+
 ## Usage
 
 Change your webpack config from
@@ -131,3 +135,7 @@ Points of note that the following loaders will have inaccurate results in this m
  * loaders emitting file output (e.g. `file-loader`) - the time taken in outputting the actual file is not included in the running time of the loader
 
 These are restrictions from technical limitations - ideally we would find solutions to these problems before removing the _(experimental)_ flag on this options
+
+## License
+
+[MIT](/LICENSE)

package.json

@@ -14,7 +14,7 @@
     "name": "Stephen Cook",
     "email": "stephen@stephencookdev.co.uk"
   },
-  "license": "ISC",
+  "license": "MIT",
   "bugs": {
     "url": "https://github.com/stephencookdev/speed-measure-webpack-plugin/issues"
   },