Fortson et al GZ overview reference

[lfortson]

Ok, while this one is ridiculously self-serving at some level, I tried to "de-bias" myself as much as possible in considering whether this was something that should be added. Obviously I determined it should be :-)

I think it would actually help to reference " Galaxy Zoo: Morphological Classification and Citizen Science" Fortson et al http://adsabs.harvard.edu/abs/2012amld.book..213F which goes through in more detail than you have space for some of the history and science results from Galaxy Zoo. I would suggest adding it to top of page 23 where you now cite Kyle Willett's GZ2 paper.

Something like:

"A full review of Galaxy Zoo science is beyond the scope of this review; a review of the project and many early science results can be found in Fortson et al. (2012), a summary of more recent science results can be found in Willett et al. (2013)."

[drphilmarshall]

Looks pretty sensible to me, apologies for the oversight and thanks for the suggested sentence!