Change Sublime references to Atom in Frontend

Author: camillevilla

sites/en/frontend/frontend.step

@@ -30,8 +30,8 @@ We're going to be working with:
 * [Chrome](https://www.google.com/chrome)
   (If you're experienced with the developer tools in another browser, that may work too.);
 * The code editor of your choice.
-    * [Sublime Text](http://www.sublimetext.com/) is popular with many Ruby and Rails users. You can use it free for evaluation, then must pay to continue using it.
     * [Atom](https://atom.io/) is a free, open-source editor that can be customized with HTML, CSS, and JavaScript. A download is available for OS X 10.8+, Windows 7/8, and Ubuntu/RedHat linux.
+    * [or install a different editor](/installfest/editors)
 
 Optional tools if you're deploying to GitHub: 
 

sites/en/frontend/get_a_sticker.step

@@ -10,7 +10,7 @@ end
 
 verify "you can open a local webpage in a browser" do
   message <<-MESSAGE
-Create a new file called `sticker.html` by opening it in Sublime Text 2 or your preferred editor.
+Create a new file called `sticker.html` by opening it in Atom or your preferred editor.
 Make a note of where you save it, you'll need to know in a second.
 
 Fill it with the following contents:

sites/en/frontend/tool_installation.step

@@ -46,10 +46,9 @@ steps do
       end
 
       step "Install a text editor" do
-        a "Download and install Sublime Text 2", :href => "http://www.sublimetext.com/2"
-        message "Install Sublime Text 2 by double clicking the file you downloaded, then dragging the Sublime Text 2 icon into the Applications folder. Finish up by clicking the eject icon for Sublime Text 2 in your finder window."
+        a "Download and install Atom", :href => "https://atom.io/"
+        message "Install Atom by double clicking the file you downloaded, then dragging the Atom icon into the Applications folder. Finish up by clicking the eject icon for Atom in your finder window."
         a "or install a different editor", :href => "/installfest/editors"
-        message "FYI: Sublime Text 2 is a paid program that you can download and try out for free. If you keep using Sublime Text 2 after the workshop, you'll need to buy a license. There are other editors available you can find on [our editors page](/installfest/editors)."
       end
     end
   end