Import version in bigchaindb.__init__

Print current version with
import bigchaindb
bigchaindb.__version__

bigchaindb/__init__.py

@@ -37,4 +37,4 @@ config = {
 # for more info.
 _config = copy.deepcopy(config)
 from bigchaindb.core import Bigchain  # noqa
-
+from bigchaindb.version import __version__  # noqa