rspec-core-2.2.1 is released!

### rspec-core-2.2.1 / 2010-11-28

[full changelog](http://github.com/rspec/rspec-core/compare/v2.2.0...master)

* Bug fixes
  * alias_method instead of override Kernel#method_missing (John Wilger)
  * changed --autotest to --tty in generated command (MIKAMI Yoshiyuki)
  * revert change to debugger (had introduced conflict with Rails)
    * also restored --debugger/-debug option