Creates QCAlgorithm.py: a bridge between C# QCAlgorithm and python algorithms

Algorithm.Python/MovingAverageCrossAlgorithm.py

@@ -11,16 +11,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import clr
-clr.AddReference("System")
-clr.AddReference("QuantConnect.Algorithm")
-clr.AddReference("QuantConnect.Indicators")
-clr.AddReference("QuantConnect.Common")
+from clr import AddReference
+AddReference("System")
+AddReference("QuantConnect.Indicators")
+AddReference("QuantConnect.Common")
 
 from System import *
 from QuantConnect import *
-from QuantConnect.Algorithm import *
 from QuantConnect.Indicators import *
+from QCAlgorithm import QCAlgorithm
 import decimal as d
 
 ### <summary>