ALLJOYN-1779 Create an MSI install program for the AllJoyn SDK for Windows.

This entails doing proper dependency checking by returning the build
products in the sconscripts.

The MSI installer can then be run after everything else is built.

Change-Id: Ie48e0c8c97334dcf47efe00aca29021c6418b46a
ALLJOYN-1781 tests for BusAttachment::IsConnected

Change-Id: I849ca8bf890dd51f27aa87e0d7b5ac9da24be165