Update IndexCtrl.js

Change newTodo to be an object rather than a primitive, as this can cause two way binding issues due to JS passing primitives by value rather than reference
Update IndexCtrl.js

Spelling error :(
Update index.html

Change newTodo to be an object rather than a primitive, as this can cause two way binding issues due to JS passing primitives by value rather than reference
Merge pull request #1 from WillGresham/master

Prevent a potential two way binding issue