Write up for Experiment number 50

[Gemmamysoc]

Have added question and short answer to Readme, and created experiment page for full write up

Closes #50

[lizconlan]

Good write-up, just those few minor points noted in line, plus these for the future:

minor points:

• you don't need to add the "new" label for a Pull Request, the "awaiting review" one is fine 😄
• a more descriptive commit message like "Write up for driving traffic to AskTheEU" is nice - helps us to know what we're letting ourselves in for 😄 No need to change this one though, all is well, just a finessing thing for future stuff

special GitHub magic:

• putting "Closes #50" on its own line in the PR description automagically links to the ticket and means GitHub closes the ticket when the branch is merged \o/

[Gemmamysoc]

Thank you @lizconlan! I have made the tweaks and pushed the commits to the branch :)

[garethrees]

@lizconlan I think this just needs a quick once over and merging