Update to latest bundler best practices, by initialize bundler using require 'bundler/setup'.

Author: wvanbergen

Rakefile

@@ -1,9 +1,3 @@
-require 'rubygems'
-require 'bundler'
-
-Bundler.setup
-
 Dir['tasks/*.rb'].each { |file| load(file) }
 GithubGem::RakeTasks.new(:gem)
-
 task :default => [:spec]

spec/spec_helper.rb

@@ -1,7 +1,6 @@
 require 'rubygems'
-require 'bundler'
-
-Bundler.require(:default)
+require 'bundler/setup'
+require 'sql_tree'
 
 # Load helper files.
 require 'helpers/matchers'