Revert "Revert "Trying to figure out how these new iOS7 foundation classes are working""

This reverts commit 8bb8802a06cf403add5128c8420810099ce0722d.
Changing towards completion blocks and certificate pinning
Upgrading Pod to something that's actually usable
PoneyDebugger, successful post request, clean up.

Next step, certificate pinning
Second step of verification intro
Certificate pinning
Merge pull request #30 from WhisperSystems/networkiOS7

Merging back network related changes.