text update for 'story so far' and 'call to action'
text update for 'story so far' and 'call to action'

murraycu/Galaxy-Zoo,alexbfree/Galaxy-Zoo,alexbfree/Galaxy-Zoo,willettk/Galaxy-Zoo,willettk/Galaxy-Zoo,zooniverse/Galaxy-Zoo,alexbfree/Galaxy-Zoo,murraycu/Galaxy-Zoo,zooniverse/Galaxy-Zoo,murraycu/Galaxy-Zoo,zooniverse/Galaxy-Zoo,willettk/Galaxy-Zoo