Remove Pods from repository, only commit the podspecs

[pivotal-rebecca]

We should just commit the Podfile and Podfile.lock, and update the .gitignore to ignore the Pods directory.

This has already been done in the 'refactor' branch: 31b4172 and we either need to merge this over or perform the same action on 'develop'.

Pros of removing Pods from the repo:

1. Smaller repo to download initially
2. No chance of committing modified pods (should be categories/subclasses). pod update will override those modifications
3. No potential conflicts to handle in Git -- everything is handled by Cocoapods.

Cons:

1. Need cocoapods to get project to build
2. Pod sources could go down (renames, retirement -- in which case we should keep current with the pods we need)

[astralbodies]

👍

[koke]

This could be a good opportunity to try something like http://jenkins-ci.org/content/literate-builds-wtf or xctool

[sendhil]

As this is going to be tricky with all the merges(and doesn't really change that much), I'm going to defer this to 3.9

[sendhil]

Punting to 3.9.1.

[sendhil]

Moving to 4.0.

[sendhil]

As per recommendation from @astralbodies , going to close this.