Opened up HTTPClient

Changes:

• Made it possible to change configuration of underlying URLSessionConfiguration

Nest serialization response errors in common error enum

• Nest serialization response errors in common error enum

Allow Changing InterpretedResponse in Response<T>.init

• Allow Changing InterpretedResponse in Response.init

Made Response<T>.init Public

• Made Response.init public

Added Reflectable.afterDeserialization and Reflectable.afterSerialization

• Added Reflectable.afterDeserialization and Reflectable.afterSerialization

Added Reflector.update, plus assertion removal

• Added Reflector.update
• Removed assert that prevented creation args from differing from starting args

Better Connection Errors

• Improved connection error reporting

Made Diff's initializers public

• Made Diff's initializers public

Reflector.copy and Reflector.diff

• Added Reflector.copy and Reflector.diff

URLTransformer

• Added a built-in and ready to go URL <--> String transformer