add Travis-CI support
Require Forwardable
Tell respond_to? to look at more than just public methods

In ruby 2.0 respond_to? returns false for protected methods.

http://tenderlovemaking.com/2012/09/07/protected-methods-and-ruby-2-0.html
tweak travis config
Merge pull request #5 from prognostikos/master

Ruby 2.0 compatibility + Travis-CI support
Test against AR ~> 4.0.0.rc1
use database_cleaner with patch for AR 4.0.0.rc1
add build status to README
Merge pull request #6 from prognostikos/ar4-testing

Add testing of ActiveRecord 4.0.0.rc1 to Travis-CI config
bumps up version number
changes the link to point to victorsavkin.com
fixed responds to id and stopped find from wrapping nil objects
merge conflicts