Properly use bundler in scripts

scripts/expandlinks.rb

@@ -1,3 +1,6 @@
+require 'rubygems'
+require 'bundler/setup'
+
 require 'csv'
 require 'net/http'
 require 'net/https'

scripts/generate-stammtisch.rb

@@ -1,6 +1,9 @@
 #!/usr/bin/env ruby
 # encoding: utf-8
 
+require 'rubygems'
+require 'bundler/setup'
+
 require 'date'
 require 'yaml'
 

scripts/update-planetfeeds.rb

@@ -1,6 +1,9 @@
 #!/usr/bin/env ruby
 # encoding: utf-8
 
+require 'rubygems'
+require 'bundler/setup'
+
 require 'yaml'
 require 'feedzirra'