doc updates

Author: dakra

README.rst

@@ -10,16 +10,16 @@ Example Usage:
 
     from atomx import Atomx
 
-    api = Atomx('daniel@atomx.com', 'password')
-    creatives = api.get('Creatives', limit=10)
+    atomx = Atomx('daniel@atomx.com', 'password')
+    creatives = atomx.get('Creatives', limit=10)
 
     for creative in creatives:
-        print('Creative ID: {c.id}, state: {c.state},'
+        print('Creative ID: {c.id}, state: {c.state}, '
               'name: {c.name}, title: {c.title}'.format(c=creative))
 
     creative = creatives[0]
     creative.title = 'shiny new title'
-    creative.save()
+    creative.update()
 
 
 Installation