Add project name; install ip6/ files to libname (IP6) and ip6 prefix
This add a project name to the CMakeLists.txt.
It also installs the xml files. Previously they were sought at compact/ (non-existent). Now they sought at ip6/, and installed to share/ip6/IP6 (libname) and share/ip6/ip6 (to have share/ip6/eic_ip6.xml resolve correctly).