[readme] Fixed typos (buliding, Polylglot)

buliding -> building, Polylglot -> Polyglot

README.md

@@ -8,13 +8,13 @@ Polyglot.js
 Polyglot.js is a tiny I18n helper library written in JavaScript, made to work both in the browser and in CommonJS environments (Node). It provides a simple solution for interpolation and pluralization, based off of Airbnb’s experience adding I18n functionality to its Backbone.js and Node apps. 
 
 I18n is incredibly important for us at [Airbnb](https://www.airbnb.com/), as we have listings in 192 countries, and we translate our site into 30-odd different languages.
-We’re also [hiring talented engineers](https://www.airbnb.com/jobs/departments/engineering) to help us scale up to meet the challenges of buliding a global marketplace.
+We’re also [hiring talented engineers](https://www.airbnb.com/jobs/departments/engineering) to help us scale up to meet the challenges of building a global marketplace.
 
 View the [documentation on Github](https://github.com/airbnb/polyglot.js).
 
 View the [annotated source](https://airbnb.io/polyglot.js/polyglot.html).
 
-Polylglot is agnostic to your translation backend. It doesn’t perform any translation; it simply gives you a way to manage translated phrases from your client- or server-side JavaScript application.
+Polyglot is agnostic to your translation backend. It doesn’t perform any translation; it simply gives you a way to manage translated phrases from your client- or server-side JavaScript application.
 
 ## Installation