Added branches/devices2_GeNN/brian2/devices/genn/templates/Makefile and branches/devices2_GeNN/brian2/codegen/languages/genn_lang.py which were omitted by mistake from a previous commit. Test run with dev/ideas/genn/genn.py was successful.
(followed by "buildmodel network_model; make; ./bin/linux/release/runner test 1" in the output directory.