Added a word test between 11 months and 1 year

What the test expects:

    Time.now #=> Jan 1, 2013
    Time.local(2013, 12, 3).ago.in_words #=> "11 months from now"

Actual:

    Time.now #=> Jan 1, 2013
    Time.local(2013, 12, 3).ago.in_words #=> "1 year from now"