Remove asset info from the development logs

No useful information, gets in the way.

Gemfile

@@ -57,6 +57,7 @@ group :development do
   gem 'pry-rails'
   gem 'hirb'
   gem 'awesome_print'
+  gem 'quiet_assets'
 end
 
 group :development, :test do

Gemfile.lock

@@ -209,6 +209,8 @@ GEM
       pry (>= 0.9.10)
     puma (2.11.1)
       rack (>= 1.1, < 2.0)
+    quiet_assets (1.1.0)
+      railties (>= 3.1, < 5.0)
     rack (1.6.0)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -374,6 +376,7 @@ DEPENDENCIES
   phony_rails
   pry-rails
   puma
+  quiet_assets
   rails (= 4.2.1)
   rails-erd
   rails-i18n