Adding in parsing

[eriksargent]

Parsing improvements to LKAPI!

All (probably) data models that are serialized from JSON data (now represented as ModelDict; Use it, it's way easier to type than [String: AnyObject]) should respond to the ModelType protocol.

This will cause all models to get the static parse function that will initialize (with data: ModelDict) that type by default, and will need to create an initializer to handle the JSON data init(data: ModelDict).

Here's where this gets awesome. No more if lets to serialize data into your models! Instead, use the parse function on the dictionary! There's three versions of the function:

• parse<T>(key: String, or fallback: T) -> T - Use this for primitive types. So to parse the id from a dictionary with the default of 0 use id = dict.parse("id", or 0)
• parse<T where T: Parseable>(key: String, type: T.Type) -> T? - Use this for parsing an AnyObject to a Parseable type. So if you want to convert a date string into a date, create a parseable extension on NSDate and define parse(data: AnyObject) -> Parseable? that converts the string to an NSDate.
• parse<T where T: ModelType>(type: T.Type) -> T? - Use this to parse a dictionary to a ModalType

Please checkout the ParsingTests.swift file for a bunch of examples on how to use the new parsing improvements.