clarified the use of the html format in REST controllers
Made clear the difference between View and ViewModels file locations.

- When starting with FuelPHP, I found it confusing why there were two 'view' folders in my app folder. I added text to clarify the difference between these two folders.

Signed-off-by: Zechariah Campbell <zech.campbell@gmail.com>
Added more code examples to the ->related() property

Signed-off-by: Zechariah Campbell <zech.campbell@gmail.com>
Merge pull request #603 from zechdc/1.8/develop

Made clear the difference between View and ViewModels file locations.
fixed incorrect paths; related #603
本家変更分をmerge