Minor formatting change

Offset a block closer to the left...
Maintenance fixes

Fix some doc-related comments.

Merged some client-test updates from AFNetworking and now performing
those tests on the LFSBaseClient (as opposed to LFSBootstrapClient).
This should ensure better robustness.
Add defines to determine OS version
Subproject commit
Default to empty string when userToken is nil
Improve content detail view layout

Also extend relative date functionality with an additional method.
UI changes

Use serif font for comment body, allow SDK user to set line spacing without subclassing,
revert to using smaller avatars (25x25pt for now), display higher-quality avatars in
detail view for content.
Merge change in README
Merge pull request #17 from Livefyre/rc2

Rc2