Abstract out the TitleView's implementation

By abstracting out the TitleView's implementation I am now able to drop
in a custom WebView version that allows for some nifty experience in
displaying HTML text.

This includes a refactor to the core where you can override the default
FSTitleView and a sample WebView implementation in the demo project.
removing debug code
fix off-by-one when displaying page
revert to use ivar's
removing demo-custom webview
fixing default titleView which was not showing - oops
Merge branch 'customTitleView' of github.com:vertigo/FSImageViewer into vertigo-customTitleView

Conflicts:
	FSImageViewer/FSImageViewerViewController.h
* Add deprecated method
* Small code convention changes
* Reset demo view controller