Install target now only copies 3rd party headers
Install target now only copies 3rd party headers

Previously, we would just copy the whole folders, which resulted in a quite large install folder. Now we're only copying the headers and the licence files.

patrikhuber/eos,icyrizard/eos,icyrizard/eos,icyrizard/eos,patrikhuber/eos,patrikhuber/eos