ALLJOYN-1779 Create an MSI install program for the AllJoyn SDK for Windows 7.
This involves proper dependency checking in the Sconscripts by returning
the build products.

Change-Id: I44e8c289c6d361b8254b011284bcc91fcb331f1c
ALLJOYN-1781 tests for busattachment_isconnected

Change-Id: I6768176cbfb82ca0ebd805c0df9e8f6ecd35205b