Fixes error: NameError: uninitialized constant Module::Numerizer

Hi, 

I was getting this error, added the require line and it went away:

    $ irb                                                                                         
    require 'tickle'
    => true
    Tickle.parse('day')
    NameError: uninitialized constant Module::Numerizer
    	    from /Users/iainuser/.rvm/gems/ruby-1.9.2-p290@risk/gems/tickle-0.1.7/lib/tickle/tickle.rb:198:in `normalize'
	    from /Users/iainuser/.rvm/gems/ruby-1.9.2-p290@risk/gems/tickle-0.1.7/lib/tickle/tickle.rb:188:in `block in post_tokenize'
	    from /Users/iainuser/.rvm/gems/ruby-1.9.2-p290@risk/gems/tickle-0.1.7/lib/tickle/tickle.rb:187:in `each'
	    from /Users/iainuser/.rvm/gems/ruby-1.9.2-p290@risk/gems/tickle-0.1.7/lib/tickle/tickle.rb:187:in `post_tokenize'
	    from /Users/iainuser/.rvm/gems/ruby-1.9.2-p290@risk/gems/tickle-0.1.7/lib/tickle/tickle.rb:74:in `parse'
	    from (irb):2
	    from /Users/iainuser/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'

Hope that's helpful.


Regards,
Iain