Add activesupport

Wanted to get away without using this. But slice/except/demodulize are
so nice...

Including it, but only loading what's specifically used.

Gemfile

@@ -5,6 +5,7 @@ gem 'sinatra', require: 'sinatra/base'
 gem 'sinatra-contrib', github: 'maccman/sinatra-contrib'
 gem 'sinatra-param', require: 'sinatra/param'
 gem 'sinatra-initializers'
+gem 'activesupport', require: false
 gem 'rack-standards'
 gem 'rack-contrib'
 gem 'puma'

Gemfile.lock

@@ -12,6 +12,12 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
+    activesupport (4.2.4)
+      i18n (~> 0.7)
+      json (~> 1.7, >= 1.7.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.3, >= 0.3.4)
+      tzinfo (~> 1.1)
     ast (2.1.0)
     astrolabe (1.3.1)
       parser (~> 2.2)
@@ -36,6 +42,7 @@ GEM
     jmespath (1.1.3)
     json (1.8.3)
     method_source (0.8.2)
+    minitest (5.8.1)
     multi_json (1.11.2)
     parser (2.2.3.0)
       ast (>= 1.1, < 3.0)
@@ -88,13 +95,17 @@ GEM
     sinatra-param (1.4.0)
       sinatra (~> 1.3)
     slop (3.6.0)
+    thread_safe (0.3.5)
     tilt (1.4.1)
+    tzinfo (1.2.2)
+      thread_safe (~> 0.1)
     wkhtmltoimage-binary (0.12.2)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  activesupport
   aws-sdk (~> 2)
   builder
   bundler

config/initializers/active_support.rb

@@ -0,0 +1,5 @@
+# Only load what we need
+require 'active_support/core_ext/hash/slice'
+require 'active_support/core_ext/hash/keys'
+require 'active_support/core_ext/hash/except'
+require 'active_support/core_ext/string/inflections'