Add newrelic_moped gem

This will hopefully give us more insight into mongo performance.

Gemfile

@@ -52,4 +52,5 @@ group :test do
 end
 
 gem 'newrelic_rpm'
+gem 'newrelic_moped'
 gem 'unicorn'

Gemfile.lock

@@ -98,6 +98,9 @@ GEM
       tzinfo (~> 0.3.22)
     moped (1.5.1)
     multi_json (1.3.6)
+    newrelic_moped (0.0.6)
+      moped
+      newrelic_rpm (~> 3.6.0)
     newrelic_rpm (3.6.8.164)
     nokogiri (1.5.5)
     origin (1.0.6)
@@ -181,6 +184,7 @@ DEPENDENCIES
   mongoid_magic_counter_cache!
   mongoid_taggable_with_context!
   moped (= 1.5.1)
+  newrelic_moped
   newrelic_rpm
   nokogiri
   pry