Add MSVC2013 support

Change-Id: I956b5796a67792f826ddc72e7681609372a9c029
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Abi: Add unit tests for MSVC2013 detection

Change-Id: I7ab801761d88c4dde45fe1fb9f6731b65ac3d0f0
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>