Package project

I added the package 'bleualign'. Because the module name must be different from the package name. I rename the module 'align.py' from 'bleualign.py'. You can rename it again if you want.
For git spec, moving and modifing files must be in two differenct commits. So git can trace the history of files.
I moved test dir outside the package in last two commits. This structure is refer to "Python Project Howto"(http://infinitemonkeycorps.net/docs/pph/)
The 'setup.py' file is refer to README. Could you check it again?
If you think this okay, we can release bleualign in PyPI for #1 .