Updated image decompression with ImageIO framework methods
Removed the ability to continue when the SSL certificate is invalid if MKNetworkOperation.shouldContinueWithInvalidCertificate is set to NO

When shouldContinueWithInvalidCertificate is set to NO the library
should cancel the request if SecTrustEvaluate returns
kSecTrustResultRecoverableTrustFailure.
Merge pull request #341 from tclayson/master

Fix to issue where request is continued with an expired SSL certificate
Merge pull request #331 from tipbit/shouldSendAcceptLanguageHeader

Make it possible to prevent the addition of the Accept-Language header.
Merge pull request #327 from tipbit/NSURLConnectionDataDelegate

Declare that MKNetworkOperation implements NSURLConnectionDataDelegate.
Merge pull request #332 from tipbit/copyForRetry

Implement MKNetworkOperation copyForRetry.
Merge pull request #330 from tipbit/addHeader

Implement MKNetworkOperation addHeader.
Merge pull request #338 from tipbit/cancel-matching-block

Implement cancelOperationsMatchingBlock.
Fixed a queue leak
UIImageView now respects animation parameter
Merge pull request #311 from j-mcnally/patch-1

Update MKNetworkEngine.m
Merge pull request #333 from tipbit/init-with-port

Add a new constructor that takes a port.
Merge remote-tracking branch 'MugunthKumar/master'

Conflicts:
	MKNetworkKit/MKNetworkOperation.m