Ordinalize should use the full month name

[kmayer]

%b (little b) renders the abbreviated month name, %B (big B) renders the full month.

BIG B, Little b, what begins with B?
Barber baby bubbles and a bumblebee.

[kmayer]

Some justification:

1. The documentation (in the README and the source code) say things like this

      # Returns an ordidinal date eg July 22 2007 -> July 22nd 2007

and

date_format: 'ordinal'     # July 3rd, 2014

1. The full month name reads better than abbreviation.
2. Why would you want to abbreviate the month and then ordinalize the date?