Fix versioning from git after `setup.py install`
Fix versioning from git after `setup.py install`

When following the `README`, __init__.py raised an
"IOError: [Errno 2] No such file or directory:" about `setup.py`.

gsalgado/pyethapp,ethereum/pyethapp,ethereum/pyethapp,changwu-tw/pyethapp,d-das/pyethapp,changwu-tw/pyethapp,vaporry/pyethapp,RomanZacharia/pyethapp,RomanZacharia/pyethapp,gsalgado/pyethapp