Add bundler as a dependency and default to generating a Gemfile.

middleman-core/lib/middleman-core/templates.rb

@@ -51,7 +51,7 @@ module Middleman::Templates
     end
     
     # Output a Gemfile file for Bundler if --bundler is passed
-    class_option :bundler, :type => :boolean, :default => false
+    class_option :bundler, :type => :boolean, :default => true
     
     # Write a Bundler Gemfile file for project
     # @return [void]

middleman-core/middleman-core.gemspec

@@ -19,6 +19,7 @@ Gem::Specification.new do |s|
   s.require_path = "lib"
   
   # Core
+  s.add_dependency("bundler", ["~> 1.0"])
   s.add_dependency("rack", ["~> 1.4.0"])
   s.add_dependency("tilt", ["~> 1.3.1"])