Added a choice between serial and coucurrent queues
[xCode] Set deployment target to 5.0
Fixed errors hierarchy. Returned conditional DDUrlBuilder dependence.
Returned conditional DDUrlBuilder support

Configured vie #define USE_DD_URL_BUILDER in JFFURLConnection.m
Added some checkers to HttpError
Added conditional "exclusive" alert

Todo : refactor some other methods to use it
[xCode] Set deployment target to 5.0
Added prefix to category

In order to avoid conflicts with ESLocale project
Added string utils
[xCode] Set deployment target to 5.0
Writing NSData to files when receiving JFFNetworkResponseDataCallback object.

It used to crash "as is"
[xCode] Set deployment target to 5.0
Added string utils
[xCode] Set deployment target to 5.0
Added timeout-less API for convenience
Returned "mapIgnoringNilError"

I use it. Sorry.
[xCode] Set deployment target to 5.0
Updated build scripts
Added missing includes
Added string utils