Updated README with note on initializing Rails app.

A lot of students were initializing their app within a subdirectory,
which is both unconventional and was causing CI to fail.

README.md

@@ -5,7 +5,7 @@ Instructions
 -------
 * Challenge time: Friday, the entire day + the weekend if you need it
 * Feel free to use Google, your notes, books, etc., but work on your own
-* You must submit a pull request to this repo with your challenge solution (or partial solution) by 9am Monday morning
+* You must submit a pull request to this repo with your challenge solution (or partial solution) by 9AM Monday morning.
 
 Task
 -----
@@ -15,8 +15,8 @@ Build Instagram: Simple huh!
 As usual please start by
 
 * Filling out your learning plan self review for the week: https://github.com/makersacademy/learning_plan (if you haven't already)
-* Forking this repo
+* Forking this repo. After cloning your fork and cd'ing into it, you'll need to [initialize a Rails app in the current directory](http://blog.jasonmeridth.com/posts/create-rails-application-in-current-directory/).
 
-Your challenge is to build Instagram using Rails. You'll need **users** who can post **pictures**, write **comments** on pictures and **like** a picture. Style it like Instagram's website (or more awesome). 
+Your challenge is to build Instagram using Rails. You'll need **users** who can post **pictures**, write **comments** on pictures and **like** a picture. Style it like Instagram's website (or more awesome).
 
-Bonus if you can add filters! 
+Bonus if you can add filters!