Fix typo in README

Author: tobybrad

README.md

@@ -42,9 +42,9 @@ There are several ways:
 
 ## Using from within a Node environment
 
-This library uses RxJs/AjaxObserverable which is meant for use in a DOM environment. That doesn't mean you can't also use it from Node though, you just need to do a couple of extra things.
+This library uses RxJs/AjaxObserverable which is meant for use in a DOM environment. That doesn't mean you can't also use it from Node though, you just need to do a couple of extra things:
 
-1. `npm install --save xh2`
+1. `npm install --save xhr2`
 2. Add the following towards the top of your main application file:
 
 ```typescript