Continuin to fine-tune language and grammar in exercise 1
Created more style consistency in events hash bulleted list
Continued language tweaks in an attempt to improve clarity
Update chapters/05-exercise-2.md

In the latest v0.9.10, Backbone changed the way to send attributes (not with the options parameter) to a third-party API. 

Now it's better with the attrs parameter.

This example is based in our implementation with Joomla CMS.

Thanks,
Update chapters/03-internals.md
Merge pull request #294 from greywolve/patch-1

Update chapters/03-internals.md
Merge pull request #291 from anibalsanchez/patch-1

Update chapters/05-exercise-2.md - Third-party Url Customization in the REST API
Merge pull request #292 from dcmaf/gh-pages

Wordsmithing and punctuation fixes in chapter 1 and 2
Merge pull request #293 from mdb/exercise-1-edits

Exercise 1 edits
Adding categorised Backbone changelog to begin #237
Changes to chapters 1 and 2

Added descriptions of the content of each chapter to the end of chapter 1.
Replaced Cranium section of chapter 2 with an example and discussion of how Backbone implements MVC pattern.
Additional wordsmithing and corrections (primarily in chapter 2)