Reverted james filter in tags branch

This reverts commit 282786d7e2.

Conflicts:

	lib/liquid.rb
	lib/liquid/variable.rb
	test/if_else_test.rb

test/assign_test.rb

@@ -1,11 +1,10 @@
 require File.dirname(__FILE__) + '/helper'
 
-class IfElseTest < Test::Unit::TestCase
+class AssignTest < Test::Unit::TestCase
   include Liquid
   
-  def test_with_filtered_expressions
-    assert_template_result('foo','{% assign foo = values|sort|last %}{{ foo }}', 'values' => %w{foo bar baz})
-    assert_template_result('foo','{% assign sorted = values|sort %}{{ sorted | last }}', 'values' => %w{foo bar baz})
+  def test_assigned_variable
+    assert_template_result('.foo.','{% assign foo = values %}.{{ foo }}.', 'values' => %w{foo bar baz})
   end
 
 end