using updated name for variable definition

README.rdoc

@@ -60,7 +60,7 @@ in the IndexTank Dashboard
 
         # to pass in a list of variables with your document,
         # supply a hash with the variable integers as keys:
-        index_variables do |topic|
+        variables do |topic|
           {
             0 => topic.popularity, # these will be available in your queries
             1 => topic.id          # as doc.var[0] and doc.var[1]

spec/spec_helper.rb

@@ -33,7 +33,7 @@ def initialize(attrs = {})
   tankit 'people' do
     indexes :name
     indexes :last_name
-    index_variables do
+    variables do
       {0 => 1.0,
        1 => 20.0,
        2 => 300.0}