w07: stubs and tests
w07e01: fib
w07e02: fibs1
w07e02: fibs2
w07e03: streamToList
w07e04: Show (Stream a)
w07e05a: streamRepeat
w07e05b: streamMap
w07e05c: streamFromSeed
w07e06a: nats
w07e06b: ruler
w07e07: randomList
w07e08: randomInts
w07e09: Profiling
w07e10: minMax
Flatten: bf92679ab5afc01c65529521e23a9cfac8ae4476
w07e11: fib4