Fixed to use one launchSession for media

Fixes https://github.com/ConnectSDK/Connect-SDK-Android/issues/68
Fixed issue with web app failing to launch on initial, fixes ConnectSDK/Connect-SDK-Android#94
Fixed resetting TV only reset current page's TV

it fixes https://github.com/ConnectSDK/Connect-SDK-Android/issues/96
Fixed issue causing disconnect events to be missed, refactored web app connection stuff a bit
App & channel lists will now scroll to selected index
Changed order of commands in TV fragment
Added leave button to web app fragment
Small change to flow in web app fragment
Fixed a few crashing issues on web app tab
Merge branch 'sdk-1.3'