License changes

Hi rubyists, I am just letting you know I've fixed licences for the following packages: rubygem-rack to MIT and (Ruby or BSD) rubygem-rails-doc to MIT and (MIT or GPL+) rubygem-railties to MIT rubygem-thread_safe to ASL 2.0 and Public Domain rubygem-erubis-doc to MIT and BSD rubygem-i18n to MIT and (BSD or Ruby) rubygem-jquery-rails to MIT rubygem-diff-lcs to (GPLv2+ or Artistic or MIT) and (GPLv2+ or Artistic or Ruby or BSD) and (Artistic or Ruby or BSD)* Thanks goes to Vit, who spotted them. Best Regards Josef * Will do when I get commit rights.