Removed unused core.scm Scheme module
Made Makefile use glfw3's pkg-config for libs/cflags
Merge branch 'develop' into feature/scheme

Conflicts:
	src/Makefile
Made rule files w/ scheme not need neighbor type or transition data.

Made a run_scm_life.sh for running an automata that uses scheme. Made
run_life use the C-based life rules