Update instructions for npm version 2 and lower

README.md

@@ -82,13 +82,25 @@ The [winston][1] codebase has been growing significantly with contributions and
   $ curl http://npmjs.org/install.sh | sh
 ```
 
-### Installing winston-loggly
+### Installing winston-loggly-bulk
+
+If you are running npm version 3 or higher then run the below command to setup the logging-
 
 ``` bash
-  $ npm install winston
   $ npm install winston-loggly-bulk
 ```
 
+If you are running npm version 2 or lower then run the below command to setup the logging-
+
+``` bash
+  $ npm install winston-loggly-bulk winston
+```
+* __Note:__ To check the currrent npm version run the below command-
+
+``` bash
+  $ npm -v
+```
+
 ## Run Tests
 All of the winston tests are written in [vows][6], and cover all of the use cases described above. You will need to add valid credentials for the various transports included to test/config.json before running tests: