Added Bullet to the Gemfile

This can be used to resolve N+1 query problems. Bullet is disabled by
default and can be enabled by starting Rails with the environment
variable ENABLE_BULLET set to a non empty value (e.g. "true").

Gemfile

@@ -224,6 +224,7 @@ group :development do
   gem 'quiet_assets', '~> 1.0.2'
   gem 'rack-mini-profiler', '~> 0.9.0', require: false
   gem 'rerun', '~> 0.10.0'
+  gem 'bullet', require: false
 
   # Better errors handler
   gem 'better_errors', '~> 1.0.1'

Gemfile.lock

@@ -87,6 +87,9 @@ GEM
       terminal-table (~> 1.4)
     browser (1.0.0)
     builder (3.2.2)
+    bullet (4.14.9)
+      activesupport (>= 3.0.0)
+      uniform_notifier (~> 1.9.0)
     byebug (6.0.2)
     cal-heatmap-rails (0.0.1)
     capybara (2.4.4)
@@ -755,6 +758,7 @@ GEM
     unicorn-worker-killer (0.4.3)
       get_process_mem (~> 0)
       unicorn (~> 4)
+    uniform_notifier (1.9.0)
     uuid (2.3.8)
       macaddr (~> 1.0)
     version_sorter (2.0.0)
@@ -800,6 +804,7 @@ DEPENDENCIES
   bootstrap-sass (~> 3.0)
   brakeman (= 3.0.1)
   browser (~> 1.0.0)
+  bullet
   byebug
   cal-heatmap-rails (~> 0.0.1)
   capybara (~> 2.4.0)

config/initializers/bullet.rb

+if ENV['ENABLE_BULLET']
+  require 'bullet'
+
+  Bullet.enable  = true
+  Bullet.console = true
+end