Move image setting to new builder method.
Allow setting and loading of remote images on all cell types.
Add cocoapods support to demo project.
Add a demo remote image cell to the main app.
Add dummy specs.
Support AFNetworking or JMImageCache
Add passing specs for remote image loading.
Add test for changing a remotely loaded image to a local image on the fly.
Merge pull request #194 from markrickert/remote-images

Allow users to set remote images on all cell types