Fix newline issue in markdown

![Markdown all the things](http://i.imgur.com/6q69Im9.jpg)
In your code the 2 commands are shown in 1 line, this because while typing you forgot a newline between the text and the codeblock (and after it as well)

       # Installation
       This theme is not (yet) available from the package management system.
       You can clone this package from here with:
    +
        cd ~/.atom/packages
        git clone git@github.com:johman10/Predawn-Atom.git```
    +
        After that you can change the UI theme within the settings of Atom.

You can merge this to fix it.

Greets