Made it clear that any authentication challenge will continue without credentials if no trusted host is specified
Keeping code more DRY. Introduced BAURLRequestService to create URL requests.
Passing immutable arrays instead of mutable ones as parameters.
Introduced post request in URL Request Service
Using the factory methods in URL Request Service to create GET/POST requests in Connector
Replaced mutable by immutable url requests.
Removed unnecessary variables when creating json arrays from NSArrays
fix for false GET request
Added schemes
Merge pull request #1 from q231950/master

Code improvements BAConnector.