./README.md in houston-2.2.1 vs ./README.md in houston-2.2.2
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Push Notifications don't have to be difficult.
Houston is a simple gem for sending Apple Push Notifications. Pass your credentials, construct your message, and send it.
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Another caveat is that Houston doesn't manage device tokens for you. For that, you should check out [Helios](http://helios.io)
> Houston is named for [Houston, TX](http://en.wikipedia.org/wiki/Houston), the metonymical home of [NASA's Johnson Space Center](http://en.wikipedia.org/wiki/Lyndon_B._Johnson_Space_Center), as in _Houston, We Have Liftoff!_.
-> It's part of a series of world-class command-line utilities for iOS development, which includes [Cupertino](https://github.com/mattt/cupertino) (Apple Dev Center management), [Shenzhen](https://github.com/mattt/shenzhen) (Building & Distribution), [Venice](https://github.com/mattt/venice) (In-App Purchase Receipt Verification), and [Dubai](https://github.com/mattt/dubai) (Passbook pass generation).
+> It's part of a series of world-class command-line utilities for iOS development, which includes [Cupertino](https://github.com/mattt/cupertino) (Apple Dev Center management), [Shenzhen](https://github.com/mattt/shenzhen) (Building & Distribution), [Venice](https://github.com/mattt/venice) (In-App Purchase Receipt Verification), [Dubai](https://github.com/mattt/dubai) (Passbook pass generation), and [Nashville](https://github.com/nomad/nashville) (iTunes Store API).
> This project is also part of a series of open source libraries covering the mission-critical aspects of an iOS app's infrastructure. Be sure to check out its sister projects: [GroundControl](https://github.com/mattt/GroundControl), [SkyLab](https://github.com/mattt/SkyLab), [houston](https://github.com/mattt/houston), and [Orbiter](https://github.com/mattt/Orbiter).
## Installation