showLoginIfNeeded will now attempt to log you in.
Work through the talk list controller to bring it up to style and get a handle on it.
Since the talk list and talk view are from the same template, the same base-level changes apply.

The reason we are not creating a superclass at this moment is the assumption that once the functionality is filled in, the identical nature of the two files will evaporate. Otherwise, it will be a good opportunity to document the refactor tool.
Create model objects that each contain a map of the GitHub keys to the Core Data property names.
* Factor key value coding magic into a GHManagedObject superclass.
* Add a date parsing category
Marshall issues into Core Data.
Load issues and display them.
* It’s not dealing with relationships yet
* You can’t drill down yet
* Give the talk list a reference to the talk view rather than the work view.
* Hand the talk view the issue when selecting an issue.
* Next step is to load the comments for the issue.