I inadvertently started to use some cmake-isms from v3.8+, even though some of our debian vms are stuck at v3.7.x. I decided to leave them in and recommend you upgrade cmake.
This PR also includes an import of the JSONCPP code since different versions of it installs itself differently, so I thought it would be easier to just import it and not have to find it on user's systems.
I inadvertently started to use some cmake-isms from v3.8+, even though some of our debian vms are stuck at v3.7.x. I decided to leave them in and recommend you upgrade cmake.
This PR also includes an import of the JSONCPP code since different versions of it installs itself differently, so I thought it would be easier to just import it and not have to find it on user's systems.