Install to location other than /usr/bin

[smherwig]

It's not clear to me how to set the install location to somewhere other than /usr/bin.

I've tried adding -DCMAKE_INSTALL_PREFIX=/home/smherwig to the COMMON_DEFINITIONS in the top-level Makefile, but this does not seem to be enough; for instance, build_generic/fs_test/cmake_install.cmake still has /usr/bin hardcoded in a few places.

Thanks.