Refactor

Move a lot of stuff from UCL/purify.
Reogarnised directory structure to have straight up Find*.cmake files on one side and new cmake functionalities on the other
Added a script that will download this repo during a cmake configure step and make it known to cmake. This script, LookUp-GreatCMakeCookOff.cmake should be downloaded and included in packages that want to the use cookoff recipes.