Added spring-pimped start scripts for rake, rails etc.

bin/spring

@@ -0,0 +1,15 @@
+#!/usr/bin/env ruby
+
+# This file loads spring without using Bundler, in order to be fast.
+# It gets overwritten when you run the `spring binstub` command.
+
+unless defined?(Spring)
+  require "rubygems"
+  require "bundler"
+
+  if match = Bundler.default_lockfile.read.match(/^GEM$.*?^    (?:  )*spring \((.*?)\)$.*?^$/m)
+    Gem.paths = { "GEM_PATH" => [Bundler.bundle_path.to_s, *Gem.path].uniq }
+    gem "spring", match[1]
+    require "spring/binstub"
+  end
+end