CMAKE_INSTALL_PREFIX and CMAKE_INSTALL_DATAROOTDIR are now used to resolve the resource path. As of this commit, there are only two paths where resources are searched, under the user home directory and under this install prefix directory (which defaults to /usr/local/share/emulationstation/resources but can be set to for instance /opt/share/emulationstation/resources using the appropriate CMake flags).
Also generated and bundled new MAME ROM index files from the latest MAME release 0.221. The BIOS and device files were merged with the previous files to retain the obsolete ROMs from older MAME versions.