Support configuration of query defaults

Change-Id: I04b2077d3b803795f070268687103c557d81606a
diff --git a/kalamar.conf b/kalamar.conf
index 4a4e0e2..56a6358 100644
--- a/kalamar.conf
+++ b/kalamar.conf
@@ -65,5 +65,11 @@
     ## Set proxy timeouts
     # proxy_inactivity_timeout => 120,
     # proxy_connect_timeout => 120,
+
+    ## Adjust defaults
+    # defaults => {
+    #   items_per_page => 20,
+    #   context => '20-t,20-t'
+    # }
   }
 }