Adds SSLPinningMode to AFURLConnectionOperation and defaultSSLPinMode to AFHTTPClient.
Fixes memory leak.
Gets rid of for loop to check if public key is present.
Added in a property to handle invalid SSL certs
Added support for repeated key value pairs through use of NSSet
Merge pull request #778 from Neonkoala/master

Support for repeated key value pairs in URL encoded forms
Stashing merge
Fixed comment typo

Minor typo.
Merge pull request #786 from tewha/patch-9

Fixed comment typo
Replacing #ifdef macro check for Security to _AFNETWORKING_PIN_SSL_CERTIFICATES_
Removing #warning about Security framework
Fixing compiler warnings in SSL pinning initializers

Minor refactoring
Adding Security framework to example projects and adding #define for _AFNETWORKING_PIN_SSL_CERTIFICATES_
Adding documentation about SSL Pinning
Minor reformatting of AFHTTPClient constants documentation
Adding Security frameworks to podspec, and defining _AFNETWORKING_PIN_SSL_CERTIFICATES_
Ensure content type for path extension doesn't return null
Merge pull request #792 from zachwaugh/master

Fix content type for extension from returning null
[Issue #791] Matching operations on request URL path rather than absolute URL string
Merge branch 'master' of github.com:AFNetworking/AFNetworking