Work in progress.

Added cocoapods and through it, AFNetworking and HPPLE.

Transitioning to AFNetworking.

Fix for auto-login crash after creating an account.

Handles ssl fail-over in more central place, not just in
article retrieval.

Search results ordering updated to reflect recent
update to mobile web search.

Fix for edit token parameters being deprecated.

Scale Wikipedia Zero message bar (at bottom of screen)
to scale with other native interface elements on iPads.

Change-Id: I991fac86a8788d3fd25595849b618a3d1ee7e699