(very minor) corrected name for plot PNG

[ghost]

I've not changed the reference to the old image in my fork but will once the cron job runs.

[philippbayer]

I think you also need to change this link:
https://github.com/openSNP/snpr/blob/master/app/views/static/statistics.html.erb#L33

[ghost]

Right. I have a bunch of changes to that file in my fork, including that: https://github.com/SXibolet/snpr/blob/master/app/views/static/statistics.html.erb
Perhaps it's best to discuss the changes on Wednesday before merging.