use new jeweler gemspec.version = feature, hooray

Rakefile

@@ -5,26 +5,9 @@ end
 begin
   require 'jeweler'
 
-  # We're not putting VERSION or VERSION.yml in the root,
-  # so we have to help Jeweler find our version.
   $LOAD_PATH.unshift File.dirname(__FILE__) + '/lib'
   require 'fakefs/version'
 
-  FakeFS::Version.instance_eval do
-    def refresh
-    end
-  end
-
-  class Jeweler
-    def version_helper
-      FakeFS::Version
-    end
-
-    def version_exists?
-      true
-    end
-  end
-
   Jeweler::Tasks.new do |gemspec|
     gemspec.name = "fakefs"
     gemspec.summary = "A fake filesystem. Use it in your tests."
@@ -33,6 +16,7 @@ begin
     gemspec.description = "A fake filesystem. Use it in your tests."
     gemspec.authors = ["Chris Wanstrath"]
     gemspec.has_rdoc = false
+    gemspec.version = FakeFS::Version.to_s
   end
 rescue LoadError
   puts "Jeweler not available."