Making the /speakers page useful!

TODO:

- [x] add talk abstracts in respective places
- [x] add speaker bio under their photo
- [ ] add links under the speaker's bio to find them on the web
- [x] link the index page talk titles to the speakers page talk abstract div
- [x] proof read all of the copy

I want to try and get this page live when we go live with the final speaker selections as well (will probably add them into this PR :smile:).