Update README.md

Add syntax highlighting for route examples
Add next section link to Models and Migrations

Add a link to the Routes section to assist in logical flow when reading.
Add next section link to Routes

Add a link to the Controller section to assist in logical flow when reading.
Update Helpers guide

* Add link to Testing section
* Add quote attribution 
* Fix spelling error
Update Testing

* Update formatting for Wikipedia quote
* Add link to jQuery & Ajax guide
* Fix spelling error
Merge pull request #1 from mbacksmeier/patch-1

Update README
Merge pull request #2 from mbacksmeier/patch-2

Add next section link to Models and Migrations
Merge pull request #3 from mbacksmeier/patch-3

Add next section link to Routes
Merge pull request #4 from mbacksmeier/patch-4

Update Helpers guide
Merge pull request #5 from mbacksmeier/patch-5

Update Testing
Merge pull request #12 from mbacksmeier/master

Update guides