setup.py: Don't use find_packages()

find_packages() will not find Hy-native packages, so hard-code the list
instead, to make things work.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
humpy: python3 compatibility

In python3, we need to force the result of map back into a list, so that
we can concatenate two lists. Also, in python3, we can't require macros
that are defined in __init__hy, so rename it to hump.hy instead.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>