Refactoring

Connect4.c

Connect4.h

Makefile

main.c

random.c

random.h

testbed/2players/test1.cand

testbed/2players/test2.cand

testbed/2players/test3.cand

testbed/2players/test4.cand

testbed/2players/test5.cand

testbed/rand_ai/test1.cand

testbed/rand_ai/test2.cand

testbed/rand_ai/test3.cand

testbed/rand_ai/test4.cand

testbed/smart_ai/test1.cand

testbed/smart_ai/test2.cand

testbed/smart_ai/test3.cand

testbed/smart_ai/test4.cand

testbed/smart_ai/test5.cand