Package with distutils.core

This is a first cut at packaging python-adb with distutils setup.

Moved source for module "adb" to directory "adb".
Added adb/__init__.py
Updated and ran adb_test.py and fastboot_test.py.
Added setup.py to build and install module.
No, adb_commands is a module, so this is fine. Google style simply says to not import things inside a module, but to import the module itself (for refactoring's sake).