Remove dependancies of ShopifyAPI in README's easy_install command.

The dependancies are downloaded automatically now with easy_install,
with ShopifyAPI v0.1.3 released and uploaded.

README.md

@@ -32,7 +32,7 @@ Regular Django Application
 
 2.  Install the pre-requisites:
 
-    `easy_install Django ShopifyAPI PyYAML pyactiveresource`
+    `easy_install Django ShopifyAPI`
 
 3.  Create the database