memory_profiler should be shipped with mini profiler

Gemfile

@@ -221,6 +221,7 @@ gem 'ruby-readability', require: false
 gem 'simple-rss', require: false
 gem 'gctools', require: false, platform: :mri_21
 gem 'stackprof', require: false, platform: :mri_21
+gem 'memory_profiler', require: false, platform: :mri_21
 
 # This silly path comment just makes it easier for me to do dev
 # will be removed in a few weeks

Gemfile.lock

@@ -155,6 +155,7 @@ GEM
     mail (2.5.4)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
+    memory_profiler (0.0.4)
     message_bus (0.9.4)
       eventmachine
       rack (>= 1.1.3)
@@ -418,6 +419,7 @@ DEPENDENCIES
   listen (= 0.7.3)
   logster
   lru_redux
+  memory_profiler
   message_bus
   minitest
   mocha

config/initializers/06-mini_profiler.rb

@@ -2,6 +2,7 @@
 if Rails.configuration.respond_to?(:enable_mini_profiler) && Rails.configuration.enable_mini_profiler
   require 'rack-mini-profiler'
   require 'flamegraph'
+  require 'memory_profiler' if RUBY_VERSION >= "2.1.0"
   # initialization is skipped so trigger it
   Rack::MiniProfilerRails.initialize!(Rails.application)
 end