Fix things up based on work in CNL App

In my Catholic News Live app, I basically redid a few things that I inherited from JJGWebView, but I didn't push those changes back upstream. I need to do that sooner or later...

Most of the changes have to do with the webview on the iPad/larger interfaces:
- Change color of spinner to dark for iPad (b/c of lighter tab bar and toolbar)
- Fix JJGWebView for no content displayed (have default empty text or HTML5ish graphic)
- Resize (make shorter) webViewToolbar in landscape mode:
- http://stackoverflow.com/questions/5219833
- SEE: shouldAutorotateToInterfaceOrientation
- Move UIActivityIndicatorView down when rotated as well
- Basically, see everything I did in CNL.