Moves some synching logic from the ReaderPostViewController to the model.
Changes ReaderPostViewController to inherit from WPTableViewController instead of WPRefreshViewController.
Updates WPTableViewController and WPTableViewControllerSubclass to support options and features needed by the reader posts list.
Merge branch 'reader' of https://github.com/wordpress-mobile/WordPress-iOS into reader

Conflicts:
	WordPress/Classes/ReaderPostsViewController.m
Merge triage.
Store topics list in NSUserDefaults for quick access the next time viewed.  Don't store extras for now.
Adds a selected color to the post cells in the reader post list. Not sure what the best visual should be but this is something to iterate on.
Use subviews for reader cell shadows
Adjust like/reblog buttons height and color
Highlight reader posts and buttons on press