Unfortunately there is no good way to deal with products in the link phase.
Products are like preprocessor defines in that they are processed early
and change the composition of the compiled unit.
Change-Id: I6d5e15ef60d29df8e83e059ba857c09333993779
An early refactor. Some ideas became clearer as
development continued. Now the various phases are much
clearer and more easily reusable.
Also added a ton of tests!
Change-Id: Ic8f0a70c8222370352e63533b329c40457c0903e