Fix for CVE-2012-2660 and CVE-2012-2694

Thanks to presidentbeef/Justin Collins for this backported security fix.
Remove nils from parameters arrays and hash.
https://github.com/presidentbeef/rails/pull/1/files
Gemspec for actionpack and modifying railties to use it

Conflicts:
	railties/railties.gemspec
need to require the version info for the actionpack gemspec
activesupport isn't patched so we can require the original
Rats. Had to patch actionmailer as it has a dependecy on actionpack.
Don't load the ActiveRecord module in the gemspec

Conflicts:
	activerecord/activerecord.gemspec
Added README