Add tips on how to find web/social media links

[netclift]

Looking at a candidate with empty social media fields might seem a bit challenging to potential volunteers. Perhaps an "add" link on blank lines with advice on the following page on how to source the data (e.g. search facebook with their email to see if their personal profile emerges for example) or even some pre formulated searches.

[netclift]

Thanks. Unfortunately, my GitHub skills currently end at putting in a general issue here. I'd be glad to work with anyone with the technical skills on this to share our social media crowd-sourcing experience ... in MN we put them in Google Spreadsheets for 20 swing seats as a test of concept.

[zarino]

I've just come across this as part of #130.

What sort of advice would you provide, and for which inputs? Is the advice specific to each input?

The person editing page already links to a Google Doc with tips on where to find new data (and #130 hopefully makes the link to that document a lot more prominent). Would just linking to that suffice? Or do you have specific advice for specific inputs?