Refactor, fix display of intermediate-visibility content

Rename LFSAuthor -> LFSAuthorProfile
Display user info in a header above new comment screen

Display user info in a header above the text field that
lets user enter a new comment or reply to an existing one.
Modify imageView content mode settings
better support for relations between content objects

Add a weak-reference hash map to content objects representing children.
Override hash and isEqual: methods for every entity class we use. Slightly
different behavior when inserting a delete event (do not propagate delta until
a correct delta is determined from the difference between children node counts
 and current parent node count).
Merge pull request #60 from Livefyre/dev

Display user info in a header above new comment screen