added count to proxy

lib/couchrest/mixins/class_proxy.rb

@@ -59,6 +59,10 @@ module CouchRest
           @klass.all({:database => @database}.merge(opts), &block)
         end
         
+        def count(opts = {}, &block)
+          @klass.all({:raw => true, :limit => 0}.merge(opts), &block)['total_rows']
+        end
+        
         def first(opts = {})
           @klass.first({:database => @database}.merge(opts))
         end

spec/couchrest/more/extended_doc_view_spec.rb

@@ -212,6 +212,9 @@ describe "ExtendedDocument views" do
       rs = @us.all
       rs.length.should == 4
     end
+    it "should count" do
+      @us.count.should == 4
+    end
     it "should make the design doc upon first query" do
       @us.by_title
       doc = @us.design_doc