Added note about node-postgres-pure

In response to Issue #495.

Author: benighted

Diff for: README.md

@@ -74,9 +74,9 @@ Documentation is a work in progress primarily taking place on the github WIKI
 
 node-postgres contains a pure JavaScript driver and also exposes JavaScript bindings to libpq.  You can use either interface.  I personally use the JavaScript bindings as the are quite fast, and I like having everything implemented in JavaScript.
 
-To use native libpq bindings replace `require('pg')` with `require('pg').native`.
+To use native libpq bindings replace `require('pg')` with `require('pg').native`.  If you __do not__ need or want the native bindings at all, consider using [node-postgres-pure](https://github.com/brianc/node-postgres-pure) instead which does not include them.
 
-The two share the same interface so __no other code changes should be required__.  If you find yourself having to change code other than the require statement when switching from `pg` to `pg.native`, please report an issue.
+The two share the same interface so __no other code changes should be required__.  If you find yourself having to change code other than the require statement when switching from `pg` to `pg.native` or `pg.js`, please report an issue.
 
 ## Features