Review JSDuck comments throughout for accuracy and completeness.

[johnyanarella]

[johnyanarella]

NOTE Need to document the optional configuration object parameter syntax for Deft.Promise::then(), Deft.Promise::otherwise() and Deft.Promise::always().

[brian428]

Since I've been slack lately (working on the TypeScript definition generator for Ext JS and Touch), I can go through the JSDuck comments if you like. I'm out of town this weekend so if you get the itch, feel free to tackle this. But if not, I can start on it early next week.