Use yajl for parsing terminal snapshots

Gemfile

@@ -24,6 +24,7 @@ gem 'coffee-rails',         '~> 4.0.0'
 gem 'uglifier',             '>= 2.1.2'
 gem 'sinatra',              '~> 1.4.3', :require => false
 gem 'active_model_serializers', '~> 0.8.1'
+gem 'yajl-ruby', :require => 'yajl'
 
 group :development do
   gem 'quiet_assets',   '~> 1.0.1'

Gemfile.lock

@@ -307,6 +307,7 @@ GEM
       raindrops (~> 0.7)
     xpath (2.0.0)
       nokogiri (~> 1.3)
+    yajl-ruby (1.1.0)
     zeus (0.13.4.pre2)
       method_source (>= 0.6.7)
 
@@ -358,4 +359,5 @@ DEPENDENCIES
   thin (~> 1.5.0)
   uglifier (>= 2.1.2)
   unicorn (~> 4.6.2)
+  yajl-ruby
   zeus (= 0.13.4.pre2)

app/models/terminal.rb

@@ -15,14 +15,14 @@ class Terminal
 
   def snapshot
     process.write("p\n")
-    lines = JSON.load(process.read_line)
+    lines = Yajl::Parser.new.parse(process.read_line)
 
     Snapshot.build(lines)
   end
 
   def cursor
     process.write("c\n")
-    c = JSON.load(process.read_line)
+    c = Yajl::Parser.new.parse(process.read_line)
 
     Cursor.new(c['x'], c['y'], c['visible'])
   end