Merge branch 'anon'

* anon:
  Pass class_entry through IS_VAR to avoid hash lookup in ZEND_NEW.
  Use "safe" anonymous class names. Don't show the mangled names through var_dump().
  Refactored using specialized opcodes
  Fix implementing_class handling
  More cleanup (mainly retab)
  Don't issue FETCH_CLASS for anon classes
  More retab
  Simply anon class name generation
  Retab
  Revert unrelated changes / rebase fixup
  Rebase Joe's anon classes implementation