Reverting 'Merge pull request #2483 python-history-provider'

We didn't experience the expected performance improvements. Locally under
unit test there was aboout an order of magnitude throughput increase, but
when run against the history benchmark, this new approach was 60% slower.
We're reverting this for now to perform further analysis and better
understand the performance profiling of the python history stack.

Algorithm.Python/BasicTemplateFuturesFrameworkAlgorithm.py

@@ -13,6 +13,7 @@
 
 from clr import AddReference
 AddReference("System")
+AddReference("QuantConnect.Algorithm")
 AddReference("QuantConnect.Algorithm.Framework")
 AddReference("QuantConnect.Common")
 
@@ -20,6 +21,7 @@ from System import *
 from QuantConnect import *
 from QuantConnect.Orders import *
 from QuantConnect.Securities import *
+from QuantConnect.Algorithm import *
 from QuantConnect.Algorithm.Framework import *
 from QuantConnect.Algorithm.Framework.Alphas import *
 from QuantConnect.Algorithm.Framework.Portfolio import *