Added concentration module to units

Tom Close · Tom Close · commit b8948514a5f0 · 2013-08-22T14:37:29.000+09:00
diff --git a/quantities/units/__init__.py b/quantities/units/__init__.py
@@ -18,6 +18,9 @@
 from . import compound
 from .compound import *
 
+from . import concentration
+from .concentration import *
+
 from . import dimensionless
 from .dimensionless import *
 
