Readme updates

README.md

@@ -2,7 +2,9 @@
 To run a given script:
 ./run.sh \<directory\>/\<script_name.py\> arguments
 
-In order to run any script you will need to ensure that the Google Cloud SDK is installed: https://cloud.google.com/sdk/downloads
-
-## Authorization
-Before running a script you will need to authorize the to set the Application Default Credentials.  You can do this by running the following command: ```gcloud auth application-default login```
+## Prerequisites
+* Install Python 2.7
+* Install Pip (run `sudo easy_install pip`)
+* Install Virtualenv (run `sudo pip install virtualenv`)
+* Install the Google Cloud SDK from https://cloud.google.com/sdk/downloads
+* Set the Application Default Credentials (run `gcloud auth application-default login`)