Update README.md
cache keyMappers in JSONModel class, not in the JSONKeyMapper class
a test to check for proper caching of keyMappers
Change isEqualToString to isKindOfClass since NSDictionary & NSArray don't have selector
Fix formatting
Change to matching p.type's class
Merge pull request #14 from joslinm/equal-string-to-kind-of-class

Change isEqualToString to isKindOfClass
p.type check fixed, added exception handling for json export
fixed confusion while merging issue #14 (which created #15) - both fixed now, forever
Update README.md
Update README.md
Update README.md

fixed image URLs
bump up the version number to 0.8.3
Update README.md
don't force supplying a non-nil nserror when creating a model
loop over the declared properties instead of incoming keys, use keyPath to refer to incoming JSON and property for the property name
implement key paths for the key mapper
added key paths to toDictionary to be used with key path key mappers
fixed keyPath handling for Optional properties
added unit test for key path key mapper