Automated testing of products and more products

[rbonifacio]

The Makefile now builds one test product (Hephaestus instance) and loads it to see whether it compiles. We would want to demonstrate that the instance can be used to build products. This needs to be scripted and added to the Makefile. We should also build more than one product and perhaps invoke parsing/export functionality also along with testing. (I am willing to give in on this one.)