Update examples/exercises to be consistent with style guide

[e-schultz]

When doing the initial content/examples - was several people working on it and no 'style guide' yet.

We have a mix of naming conventions, how things are structured, etc.

Should try to update things in terms of

• inline code examples
• plunkrs
• exercise folder
• example folder

To be consistent, and closer to the https://angular.io/styleguide

[alejochang]

• [x] add linting
• example folder
  • [x] advanced-angular
  • [x] advanced-components
  • [x] bootstrapping
  • [x] change-detection
  • [x] components
    • [x] components-basic - "Creating Components" section
    • [x] components-events - "Responding to Component Events" section
    • [x] components-events-outputs - "Responding to Component Events" section
    • [x] components-input - "Passing Data into a Component" section
    • [x] components-ngFor (Deleted)
    • [x] components-projection - "Projection"
    • [x] components-two-way-binding - "Using Two-Way Data Binding"
  • [x] dependency-injection
  • [x] directives
  • [x] form-builder
  • [x] modules
  • [ ] ng-upgrade
  • [ ] observables
  • [x] pipes
  • [ ] redux
  • [ ] routing
  • [ ] testing
  • [x] http

[alejochang]

Adding linting to perform an initial clean up. I'll use it to help me to update the example/exercises incrementally but it'll be added at the end with the last PR.

[alejochang]

I'm doing a pull request by section, which covers code example / plunkers and inline code updates