changed Error code when response mapping declined with `willMapDeserializedResponseBlock` block
Fix memory leak in state machine. closes #1593
Fix documentation issue on `addAttributeMappingToKeyOfRepresentationFromAttribute:` and transparently transition to using braces instead of parentheses for denoting variables in key paths. closes #1449
Merge pull request #1570 from almassapargali/development

changed Error code when response mapping declined with `willMapDeserializedResponseBlock` block