Add bundler release tasks

Rakefile

@@ -1,7 +1,7 @@
 #!/usr/bin/env rake
 require 'rake/testtask'
-require 'rake/packagetask'
-require 'rubygems/package_task'
+require 'bundler'
+Bundler::GemHelper.install_tasks
 
 desc "Default Task"
 task :default => [ :test ]
@@ -48,29 +48,3 @@ task :lines do
 
   puts "Total: Lines #{total_lines}, LOC #{total_codelines}"
 end
-
-# Publishing ------------------------------------------------------
-
-spec = eval(File.read('activeresource.gemspec'))
-gem = "pkg/activeresource-#{spec.version}.gem"
-tag = "v#{spec.version}"
-
-desc "Release to rubygems.org"
-task :release => [:ensure_clean_state, :tag, :push]
-
-task(:tag) { sh "git tag #{tag} && git push --tags" }
-
-task(:push => :repackage) { sh "gem push #{gem}" }
-task(:install => :repackage) { sh "gem install #{gem}" }
-Gem::PackageTask.new(spec) { |p| p.gem_spec = spec }
-
-task :ensure_clean_state do
-  unless `git status -s`.strip.empty?
-    abort "[ABORTING] `git status` reports a dirty tree. Make sure all changes are committed"
-  end
-
-  unless ENV['SKIP_TAG'] || `git tag | grep #{tag}`.strip.empty?
-    abort "[ABORTING] `git tag` shows that #{tag} already exists. Has this version already\n"\
-      "           been released? Git tagging can be skipped by setting SKIP_TAG=1"
-  end
-end