make sure we do not have the (same) version name speficied twice

therubyrhino_jar.gemspec

@@ -1,9 +1,10 @@
 # -*- encoding: utf-8 -*-
-#$:.push File.expand_path("../jar", __FILE__)
+$:.push File.expand_path("../jar", __FILE__)
+require 'rhino/jar_path'
 
 Gem::Specification.new do |s|
   s.name = %q{therubyrhino_jar}
-  s.version = '1.7.4'
+  s.version = "#{Rhino::JAR_VERSION}"
   s.authors = ["Charles Lowell", "Karol Bucek"]
   s.email = ['cowboyd@thefrontside.net', 'self@kares.org']