Fix #2 + #5 Make Python 3 compat

bitmath/__init__.py

@@ -564,8 +564,7 @@ def __div__(self, other):
             return self._byte_value / float(other.bytes)
 
     def __truediv__(self, other):
-        # TODO: Fix truediv for num / bm
-        # https://github.com/tbielawa/bitmath/issues/2
+        # num / bm
         return self.__div__(other)
 
     # def __floordiv__(self, other):
@@ -612,6 +611,10 @@ def __rdiv__(self, other):
         # num / bm = num
         return other / float(self.value)
 
+    def __rtruediv__(self, other):
+        # num / bm = num
+        return other / float(self.value)
+
     """Called to implement the built-in functions complex(), int(),
 long(), and float(). Should return a value of the appropriate type.