Rakefile

Hi Matt.  I'm a bit new to this so forgive me if I do something wrong.  It looks like this repository hasn't been  updated in a while.  I forked it to add a bit of new functionality (see my README.txt), and before doing anything else, tried to run 'rake -T'.  

Uh-oh - missing gems all over the place!  So I creating a Gemfile and added stuff until I got it to work (sorta).  Then I had to update the Rakefile itself.  It appears that the config variable 'spec_files' has been replaced by 'pattern'.  I commented out the original lines instead of deleting them, just in case someone is still using an older version of Rspec.

You may not want any of this stuff, because you might already have something better.  If so, please let me know where I can get it!  Otherwise, hope this helps you or someone else.