Merge pull request #37 from writethedocs/ruth

Adding abstracts, made "all the talks" instead of some of the talks
Update announcing-na-conference-talks.rst
Update names
Add Juliana Arrighi abstract
Update talks.rst
Update talks.rst
Fix name of twitter talk
Fix title
trya nd fix formatting
Small edits
Fix words
Words
Fix abstract
Fix susan's talks
Adding available slide decks, removing bio section from Susan's talk