• added generic custom setter method - setPropertyNameWithJSONObject

• added new built-in key mapper - mapperForTitleCase

• when a data transformer is missing, we now return an error rather than throwing an exception

• deprecated mapperFromUpperCaseToLowerCase (not replaced - it didn't really make sense)
• renamed mapperFromUnderscoreCaseToCamelCase to mapperForSnakeCase for clarity

• change use of performSelector to a safer implementation

• restructured custom getter/setter system to resolve crash reported in #436 (thanks @robinzhangx & @hfossli)

• deprecated all JSON->Model key mapper methods for consistency's sake - replaced with equivalent Model->JSON methods with clearer naming

Sorry for the long time since the last release. We'll be trying to maintain a
more rapid release schedule going forwards.

• precision issue fixed with deserializing numbers
• support added for deserializing into a 'root' dictionary (dictionaryOfModelsFromDictionary:error:, etc.)
• lazy collection-type conversion (ConvertOnDemand) is no longer supported
• deprecated two way key mapping deprecated - only Model->JSON has ever worked anyway
• deprecated all networking support
• deprecated the global key mapper
• deprecated Index protocol
• deprecated protocolForArrayProperty: in favor of classForCollectionProperty:
• modulemap file added to handle use as a framework better
• success return value added to mergeFromDictionary:useKeyMapping:error:
• JSONModel has now been moved out into its own GitHub organization, etc. - now maintained by multiple people

Potential Breaking Changes

• new behavior for handling null values when serializing:
  • values of NSNull will now always null in JSON output
  • values of nil will now never be included in JSON output

• support added for watchOS and tvOS
• minimum iOS version bumped to 6.0
• support added for Carthage
• deprecated +arrayOfModelsFromDictionaries: in favor of +arrayOfModelsFromDictionaries:error:
• added +arrayOfModelsFromString:error:
• deprecated +mergeFromDictionary: in favor of mergeFromDictionary:useKeyMapping:error:
• added support for multiple custom setters
• fixed -hash implementation
• added responseData property to JSONModelError
• added support for creating a key mapper with exceptions (+mapper:withExceptions:)
• locks now used in key mapper implementation for additional safety
• fixed behavior of NSURLFromNSString transformer
• updated project files to latest Xcode
• updated demo apps to work with the latest JSONModel & external API code