Stripped out MultiScreen discovery for next 1.3.x release

MultiScreen will still be present in the sdk_1.4 branch, but since we are backporting a ton of changes to a 1.3.2 release, we are pulling it for now.
Cleared warning in UPnP Device class
Removed a comment
Fixed Chromecast Inconsistent behavior when beaming videos from different users #137
Updated Status message for error
Fixed issue with launching media player while web app is open #138
Project file update
Added build.grade to support Android Studio (#132)
Added .iml file for project (helps with Gradle/Android Studio integration)
Decoupled Netcast and DLNA services (#39)
Increased version numbers in prep for next release
Updated changelog