Corrected some typos in Models Reference.

- Fixed various typos and grammatical errors.
- Updated Behavior "Blameable" to instead be declared as "Blamable" so that it is consist with the spelling used elsewhere.
Corrected various grammatical errors.
Corrected some grammar and typos.
Corrected incorrect getter name and some typos.
Merge pull request #451 from tyler-shaw/master

Correct various typos in the text and examples in the English docs.