Chapter 1: Fundamentals - correct typos and punctuation
Fixes in Prelude and Extensions (Marionette) sections

- Changed 'foundations' to 'foundation' in prelude.

- Marionette:
  - removed 'this' context argument from calls to listenTo()
  - fixed zombie example to use Derick instances rather than Person
  - changed 'in to' to 'into'
Changed first view in memory management example to use on rather than listenTo to make it consistent with discussion text.
Merge pull request #384 from dcmaf/gh-pages

Chapter 1: Introduction - Fixed typos and punctuation