Use Bundler install tasks

Rakefile

@@ -2,6 +2,8 @@ require 'date'
 require 'fileutils'
 require 'openssl'
 require 'rake/testtask'
+require 'bundler'
+Bundler::GemHelper.install_tasks
 
 task :default => :test
 
@@ -67,47 +69,3 @@ desc "Open an irb session preloaded with this library"
 task :console do
   sh "irb -rubygems -r ./lib/#{name}.rb"
 end
-
-## release management tasks
-
-desc "Commit, create tag v#{version} and build and push #{gem_file} to Rubygems"
-task :release => :build do
-  sh "git commit --allow-empty -a -m 'Release #{version}'"
-  sh "git tag v#{version}"
-  sh "git push origin"
-  sh "git push origin v#{version}"
-  sh "gem push pkg/#{gem_file}"
-end
-
-desc "Build #{gem_file} into the pkg directory"
-task :build => :gemspec do
-  FileUtils.mkdir_p 'pkg'
-  sh "gem build #{gemspec_file}"
-  sh "mv #{gem_file} pkg"
-end
-
-desc "Generate #{gemspec_file}"
-task :gemspec do
-  # read spec file and split out manifest section
-  spec = File.read(gemspec_file)
-  head, manifest, tail = spec.split("  # = MANIFEST =\n")
-
-  # replace name version and date
-  replace_header(head, :name)
-  replace_header(head, :version)
-
-  # determine file list from git ls-files
-  files = `git ls-files`.
-    split("\n").
-    sort.
-    reject { |file| file =~ /^\./ }.
-    reject { |file| file =~ /^(rdoc|pkg)/ }.
-    map { |file| "    #{file}" }.
-    join("\n")
-
-  # piece file back together and write
-  manifest = "  s.files = %w[\n#{files}\n  ]\n"
-  spec = [head, manifest, tail].join("  # = MANIFEST =\n")
-  File.open(gemspec_file, 'w') { |io| io.write(spec) }
-  puts "Updated #{gemspec_file}"
-end