added the cpp and h files for interface acceptance tests to the installation step of the cyclus core.
added the cpp and h files for interface acceptance tests to the installation step of the cyclus core.

hodger/cyclus,hodger/cyclus,mbmcgarry/cyclus,hodger/cyclus,rwcarlsen/cyclus,mbmcgarry/cyclus,Baaaaam/cyclus,Baaaaam/cyclus,rwcarlsen/cyclus,Baaaaam/cyclus,mbmcgarry/cyclus,mbmcgarry/cyclus,gidden/cyclus,gidden/cyclus,hodger/cyclus,gidden/cyclus,hodger/cyclus,rwcarlsen/cyclus,rwcarlsen/cyclus,gidden/cyclus