move lib/version.rb to lib/active_support/version.rb

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2517 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/Rakefile

@@ -2,7 +2,7 @@ require 'rake/testtask'
 require 'rake/rdoctask'
 require 'rake/gempackagetask'
 require 'rake/contrib/rubyforgepublisher'
-require File.join(File.dirname(__FILE__), 'lib', 'version')
+require File.join(File.dirname(__FILE__), 'lib', 'active_support', 'version')
 
 PKG_BUILD     = ENV['PKG_BUILD'] ? '.' + ENV['PKG_BUILD'] : ''
 PKG_NAME      = 'activesupport'