+ Added minitest/manual_plugins.rb w/ new Minitest.load method. (tend…

…erlove)

eg:
  require "minitest/autorun"
  require "minitest/manual_plugins"
  Minitest.load :pride, :gcstats
runs about 5% faster on my machine (~100 gems)

[git-p4: depot-paths = "//src/minitest/dev/": change = 14137]

Manifest.txt

@@ -12,6 +12,7 @@ lib/minitest/benchmark.rb
 lib/minitest/compress.rb
 lib/minitest/expectations.rb
 lib/minitest/hell.rb
+lib/minitest/manual_plugins.rb
 lib/minitest/mock.rb
 lib/minitest/parallel.rb
 lib/minitest/pride.rb

lib/minitest/manual_plugins.rb

@@ -0,0 +1,16 @@
+require "minitest"
+
+ARGV << "--no-plugins"
+
+module Minitest
+  ##
+  # Manually load plugins by name.
+
+  def self.load *names
+    names.each do |name|
+      require "minitest/#{name}_plugin"
+
+      self.extensions << name.to_s
+    end
+  end
+end