0.4.0

Added

• ProxySchema
• apply_defaults to apply schema defaults to a config dict

Fixed

• Schema.walk now triggers the callback before entering subschemas

Changed

• Schema now extends Attribute and is now working on instances rather than classmethod based
• Attribute name is now optional when attribute is member of list
• renamed ListAttribute to List
• renamed StringAttribute to Str
• renamed IntAttribute to Int
• renamed FloatAttribute to Float
• renamed BooleanAttribute to Bool
• renamed DirectoryAttribute to Directory