= 0.9.0 / 2012-01-23

 * Add thread-safe behavior to `AFURLConnectionOperation` (Mattt Thompson)

 * Add batching of operations for `AFHTTPClient` (Mattt Thompson)

 * Add authentication challenge callback block to override default implementation of `connection:didReceiveAuthenticationChallenge:` in `AFURLConnectionOperation` (Mattt Thompson)

 * Add `_AFNETWORKING_PREFER_NSJSONSERIALIZATION_`, which, when defined, short-circuits the standard preference ordering used in `AFJSONEncode` and `AFJSONDecode` to use `NSJSONSerialization` when available, falling back on third-party-libraries. (Mattt Thompson, Shane Vitarana)

 * Add custom `description` for `AFURLConnectionOperation` and `AFHTTPClient` (Mattt Thompson)

 * Add `text/javascript` to default acceptable content types for `AFJSONRequestOperation` (Jake Boxer)

 * Add `imageScale` property to change resolution of images constructed from cached data (Štěpán Petrů)

 * Add note about third party JSON libraries in README (David Keegan)

 * `AFQueryStringFromParametersWithEncoding` formats `NSArray` values in the form `key[]=value1&key[]=value2` instead of `key=(value1,value2)` (Dan Thorpe)

  * `AFImageRequestOperation -responseImage` on OS X uses `NSBitmapImageRep` to determine the correct pixel dimensions of the image (David Keegan)

 * `AFURLConnectionOperation` `connection` has memory management policy `assign` to avoid retain cycles caused by `NSURLConnection` retaining its delegate (Mattt Thompson)

 * `AFURLConnectionOperation` calls super implementation for `-isReady`, following the guidelines for `NSOperation` subclasses (Mattt Thompson)

 * `UIImageView -setImageWithURL:` and related methods call success callback after setting image (Cameron Boehmer)

 * Cancel request if an authentication challenge has no suitable credentials in `AFURLConnectionOperation -connection:didReceiveAuthenticationChallenge:` (Jorge Bernal)

 * Remove exception from `multipartFormRequestWithMethod:path:parameters:constructingBodyWithBlock:` raised when certain HTTP methods are used. (Mattt Thompson)

 * Remove `AFImageCache` from public API, moving it into private implementation of `UIImageView+AFNetworking` (Mattt Thompson)

  * Mac example application makes better use of AppKit technologies and conventions (Mattt Thompson)

 * Fix issue with multipart form boundaries in `AFHTTPClient -multipartFormRequestWithMethod:path:parameters:constructingBodyWithBlock:` (Ray Morgan, Mattt Thompson, Sam Soffes)

 * Fix "File Upload with Progress Callback" code snippet in README (Larry Legend)

 * Fix to SBJSON invocations in `AFJSONEncode` and `AFJSONDecode` (Matthias Tretter, James Frye)

 * Fix documentation for `AFHTTPClient requestWithMethod:path:parameters:` (Michael Parker)

 * Fix `Content-Disposition` headers used for multipart form construction (Michael Parker)

 * Add network reachability status change callback property to `AFHTTPClient`. (Mattt Thompson, Kevin Harwood)

 * Fix exception handling in `AFJSONEncode` and `AFJSONDecode` (David Keegan)

 * Fix `NSData` initialization with string in `AFBase64EncodedStringFromString` (Adam Ernst, Mattt Thompson)

 * Fix error check in `appendPartWithFileURL:name:error:` (Warren Moore, Baldoph, Mattt Thompson)

 * Fix compiler warnings for certain configurations (Charlie Williams)

 * Fix bug caused by passing zero-length `responseData` to response object initializers (Mattt Thompson, Serge Paquet)