Removed the nib files and build collection/table views in code instead

Title says it all. The two nib files in the project worked in the example project, but got all crashy when using it as a pod. It's something to do with the bundle, and rather than fighting with it, I just yanked out the nibs: they only contained a table view and collection view, so it wasn't a complicated procedure.

@vokalinteractive/ios-developers could someone give this a review?

Since @lquigley is out this week, so PING PING PING co-sponsor @designatednerd.
Yes, but I think it needed to be the sample project's display name to work.  In [the `podspec` file](https://github.com/vokalinteractive/VOKMultiImagePicker-iOS/blob/master/VOKMultiImagePicker-iOS.podspec), it names the bundle being created as `'VOKMultiImagePicker-iOS'`.  Also, that `s.resource_bundles` bit in the `podspec` can probably be nuked if there are no XIBs/storyboards now.