Get rid of AFNetworking

[shigmas]

Currently, network status indicator, and reachability has been implemented in FANG. JSON wrangling needs to be added.

[shigmas]

Doing this in 2 parts:

Part 1 of Removing AFNetworking:

• Security: Added the self-signed certificate to the project so we can verify it.
• Use NSURLSession instead of AFHTTPSessionManager and AFRequestOperationManager
• Store the cookie in the NSURLSessionConfiguration.
• convert the FANGRequest to NSURLRequest. Required some parsing and conversion of the parameters.

Part 2: Stop including the AFNetworking library.

Long term: Handle parameters in JSON on the server, and start sending JSON in the post body on the client and set the content type to be JSON.

[shigmas]

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