Merge pull request #14 from lgeiger/install-instructions

Clarify install instructions

README.md

@@ -4,6 +4,8 @@ With Hydrogen Launcher you can open a terminal at the current working directory
 
 It is tested on linux, macOS and windows. You also can easily configure it to use your favorite terminal application.
 
+## Usage
+
 If you are using [Hydrogen](https://github.com/nteract/hydrogen/) to work with jupyter kernels you can launch a [jupyter](http://jupyter.org/) or [ipython](https://ipython.org/) console connected to your running kernel.
 
 Launch terminals from Atom | Launch [jupyter](http://jupyter.org/) consoles connected to [Hydrogen](https://github.com/nteract/hydrogen)
@@ -14,3 +16,7 @@ Launch terminals from Atom | Launch [jupyter](http://jupyter.org/) consoles conn
 **Launch [jupyter](http://jupyter.org/) consoles connected to [Hydrogen](https://github.com/nteract/hydrogen) inside [PlatformIO IDE Terminal](https://github.com/platformio/platformio-atom-ide-terminal)**
 
 ![platformio](https://cloud.githubusercontent.com/assets/13285808/21818082/bffff466-d766-11e6-8dac-a7940b8b486d.gif)
+
+## Installation
+
+Run `apm install hydrogen-launcher` from the command line or search for `hydrogen-launcher` in the [install pane of the Atom settings](http://flight-manual.atom.io/using-atom/sections/atom-packages/).