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.
The operating system is actually Linux, and should work on Windows, Mac, etc. None of this repo actually runs on Android.