add update check

Author: stephenc

update-check.rb

@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+
+require 'rubygems'
+require 'nokogiri'
+require 'json'
+require 'open-uri'
+
+current = Gem::SpecFetcher.fetcher.find_matching(Gem::Dependency.new 'sass')[0][0][1]
+
+maven = Gem::Version.new(Nokogiri::XML(File.open(File.expand_path('../pom.xml', __FILE__))).remove_namespaces!.xpath("/project/version").first.content().sub /-SNAPSHOT/,"")
+
+puts "["+File.dirname(__FILE__)+"]   Next redist: " + maven.to_s
+puts "["+File.dirname(__FILE__)+"] Last upstream: " + current.to_s
+
+if current >= maven
+	puts "["+File.dirname(__FILE__)+"] A release can be made!!!"
+	exit 1 
+end
+puts "["+File.dirname(__FILE__)+"] Everything up to date."