Remove dependency of rubygems

Closes gh-27

Rakefile

@@ -1,4 +1,3 @@
-require 'rubygems'
 require 'rake'
 
 begin

bin/httparty

@@ -94,7 +94,6 @@ else
   case opts[:output_format]
     when :json
       begin
-        require 'rubygems'
         require 'json'
         puts JSON.pretty_generate(response.delegate)
       rescue LoadError

lib/httparty.rb

@@ -1,8 +1,6 @@
 require 'pathname'
 require 'net/http'
 require 'net/https'
-require 'rubygems'
-gem 'crack', '>= 0.1.1'
 require 'crack'
 
 dir = Pathname(__FILE__).dirname.expand_path

spec/spec_helper.rb

@@ -1,6 +1,4 @@
 require File.join(File.dirname(__FILE__), '..', 'lib', 'httparty')
-gem 'rspec', '1.2.9'
-gem 'fakeweb'
 require 'spec/autorun'
 require 'fakeweb'