Snag list

- [x] add Ben co-presenting with Simon
- [x] add Ben and Simon abstract
- [x] remove the word "Role" from Aslam's profile on the Speaker list page, and on his individual page
- [x] speaker list page: standardise speaker photos
- [x] speaker list page: Niklas's job title/role = "Backend Engineer"
- [x] Niklas individual page: make his blog URL a link
- [x] update the talk description for Deon Moolman as per spreadsheet
- [x] Wim Godden's individual speaker page: remove the repetition of his name in the first line of his bio
- [x] add Wim Godden Twitter handle https://twitter.com/wimgtr
- [x] Zabil and Simba: their names need to be incorporated into the bio paragraph
- [x] Simon Cross individual page: include his Twitter handle https://twitter.com/hodgestar
- [x] Dustin Whittle: use the talk description from spreadsheet