Update README.md
Few small tweaks to work better with 2012/13 LG Smart TVs
Added a join button to the web app tab
Removed incoming call button
Added background notification to BaseViewController
Exposed visibility of app state notifications to subclasses
Re-join web app on app resume
Added a bit of logging to app to app
Enable close button on web app join
Changed Roku app store launch id
Changed app store launch id
Updated YouTube content id
Fixed unexpected behavior when web app disconnect is detected
Small UX tweaks
Fixed crashing bug in mouse
Added close method to close web app button handler
Slight improvements to state handling in web app tab
Cleanup on web app disconnect
Merge branch 'sdk_1.3'

Conflicts:
	Connect SDK Sampler/Content/AppsViewController.m
	Connect SDK Sampler/Content/WebAppViewController.h
	Connect SDK Sampler/Content/WebAppViewController.m
	Connect SDK Sampler/MainStoryboard.storyboard
Added samsung multiscreen support in web app tab