- fix for unescaped brackets in params values
[Issue #1217] Cutting the knot with respect to API compatibility
Build and run unit tests against the iOS 5.0 SDK to validate minimum deployment target compatibility
[Issue #1241] Fixing potential race condition in cancelConnection
Merge branch 'bracket-pull-request' of github.com:opentable/AFNetworking into opentable-bracket-pull-request

Conflicts:
	AFNetworking/AFHTTPClient.m
Fixing merge in 52ad3f838022b2bc0d5e7f897e695dc8bc0fc227
[Issue #887] [Issue #1096] Removing implementation of connection:needNewBodyStream:
[Issue #1288] Improving implementation of connection:didRecieveData: to handle case where stream -hasSpaceAvailable returns NO by polling. For in-memory buffers, this will almost never happen.

[Issue #1093] Handling stream errors in connection:didRecieveData:
[Issue #1093] Handling stream errors for AFMultipartBodyStream
[Issue #1288] Adding loop around write to ensure entire length of data is written