tarcieri/timers — pull request #3 by nevans (2012-07-16 16:53:05+00:00)
Title: Explicitly require 'forwardable' from stdlib

The specs didn't catch this, because rspec requires it already.

````
$ ruby -r ./lib/timers.rb -e "puts 'Hello world'"
/home/nick/src/vendor/timers/lib/timers.rb:8:in `': uninitialized constant Timers::Forwardable (NameError)
from /home/nick/src/vendor/timers/lib/timers.rb:6:in `'
from /home/nick/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /home/nick/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
````