Support pseudo generic class with protocol name, bug fixes

• Support pseudo generic class with protocol name (similar to JSONModel)
• Support especial keypath (such as ".ext" "a...b") in some situation: #112
• Fix typo

Support more date format

• Added millisecond support to date parsing

Add more custom transform method, bug fixes

• Add custom transform method before the default json to model
• Fix wrong model description for NSDictionary #62
• Fix wrong result when the property's type is id #60

Add method for class info update

• Add needUpdate method for YYClassInfo
• Update the model meta info after YYClassInfo updated

First release, stable API

• Bug fixes
• Add unit testing
• Swift api compatibility