Fix dead link to http://keplerscience.arc.nasa.gov/k2-photometric-performance.html#photometric-performance

[mrtommyb]

Per email: From: tlhackque tlhackque@yahoo.com Subject: Dead link on kepler website Date: November 26, 2015 at 12:32:07 PM PST To: keplergo@mail.arc.nasa.gov

http://keplerscience.arc.nasa.gov/k2-photometric-performance.html#photometric-performance is a dead link, which is referenced from http://keplerscience.arc.nasa.gov/objectives.html

The referral is under the heading "K2", and is under the text "approaching that of the original Kepler mission"

[mrtommyb]

I have fixed the link on http://keplerscience.arc.nasa.gov/objectives.html with 6bf20be

[mrtommyb]

I found a couple of other dead links and fixed them too with 8a6d7c3 @barentsen can you push this to the live site and then close

[barentsen]

Live site has been updated.