upgrade to ActiveSupport 3
add ActiveSupport 3 dependencies
import ActiveSupport 3 tests
try to use bundler install of Gemfile.sh
bring over deps from activesupport 3
we don't need the isolated environment when using bundler
add tzinfo and builder to the gemfile
use load_paths in actionpack, activeresource and activerecord
require active_support/all everywhere
make actionpack depend on erubis
bring back inheritable_attributes, too much of Rails 2 internals uses it
remove bytesize require
remove ActiveSupport::SecureRandom