Move code out of __init__.py files, attempt #2.
Review Request #144 — Created March 24, 2014 and submitted
Move code out of __init__.py files, attempt #2. This includes getting rid of command registration magic, since it's complicated and commands are going away entirely anyway.
./build-support/python/clean.sh ./pants.bootstrap Unit tests ("PANTS_DEV=1 ./pants.bootstrap tests/python/twitter/pants:all" or "./build-support/bin/ci.sh") don't work in master, at least on my machine, due to Python version conflicts, so I can't try them out on this branch. But things are at least no worse than on master.