Add pre-release @next channel to readme

Author: lutovich

README.md

@@ -6,12 +6,21 @@ Find detailed docs [here](http://neo4j.com/docs/api/javascript-driver/current/).
 
 ## Include module in Node.js application
 
+Stable channel:
 ```shell
 npm install neo4j-driver
 // or
 bower install neo4j-driver
 ```
 
+Pre-release channel:
+```shell
+npm install neo4j-driver@next
+```
+
+Please note that `@next` only points to pre-releases that are not suitable for production use.
+To get the latest stable release omit `@next` part altogether or use `@latest` instead.
+
 ```javascript
 var neo4j = require('neo4j-driver');
 ```