Removed String monkey patch

We hit this issue in production: caseyhoward#8

Seeing as the monkey patch is not used internally and we don't use it
either, the best course of action seemed to be removing it.

Gemfile

@@ -1,3 +1,3 @@
-source 'http://rubygems.org'
+source 'https://rubygems.org'
 
 gemspec

Gemfile.lock

@@ -1,14 +1,17 @@
 PATH
   remote: .
   specs:
-    nokogiri-plist (0.4.1)
+    nokogiri-plist (0.5.0)
       nokogiri
 
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
+    mini_portile (0.6.2)
     mocha (0.9.12)
-    nokogiri (1.4.4)
+    nokogiri (1.6.6.2)
+      mini_portile (~> 0.6.0)
+    rake (0.9.6)
     shoulda (2.11.3)
 
 PLATFORMS
@@ -17,4 +20,8 @@ PLATFORMS
 DEPENDENCIES
   mocha
   nokogiri-plist!
+  rake
   shoulda
+
+BUNDLED WITH
+   1.10.6

Rakefile

@@ -1,7 +1,6 @@
 require 'rake/testtask'
 
 Rake::TestTask.new :test do |t|
-  require 'redgreen' if Gem.available?('redgreen')
   t.libs << 'lib'
   t.pattern = 'test/**/test_*.rb'
   t.verbose = true

lib/nokogiri-plist.rb

@@ -14,6 +14,4 @@
 require 'nokogiri-plist/node'
 require 'nokogiri-plist/plist'
 
-require 'core_ext/string'
-
-Nokogiri::XML::Node.send :include, NokogiriPList::Node
+Nokogiri::XML::Node.send :include, NokogiriPList::Node

nokogiri-plist.gemspec

@@ -15,8 +15,9 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = ">= 1.3.6"
 
-  s.add_development_dependency 'shoulda'
   s.add_development_dependency 'mocha'
+  s.add_development_dependency 'rake'
+  s.add_development_dependency 'shoulda'
 
   s.add_dependency 'nokogiri'
 

test/nokogiri-plist/test_generator.rb

@@ -1,4 +1,4 @@
-require 'test/test_helper'
+require_relative '../test_helper'
 
 class NokogiriPList::GeneratorTest < Test::Unit::TestCase
 

test/test_helper.rb

@@ -5,4 +5,4 @@
 ROOT = File.join(File.expand_path(File.dirname(__FILE__)), '..')
 
 $LOAD_PATH.unshift(ROOT)
-require File.join('nokogiri-plist.rb')
+require File.join('nokogiri-plist.rb')