Added Fixnum#even? and Fixnum#odd?

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1095 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support/core_ext/fixnum.rb

+require File.dirname(__FILE__) + '/fixnum/even_odd'
+
+class Fixnum #:nodoc:
+  include ActiveSupport::CoreExtensions::Fixnum::EvenOdd
+end