Adds overloads to Plot and PlotIndicator to handle calls from python.
Adds CustomChartingAlgorithm and changes MACDTrendAlgorithm to showcase the feature
Some python algorithms suffered corrections to run under the new python framework (pythonnet).
Others were deleted because some features will be supported in futures implementations.
Adds a method in AlgorithmPythonUtil to transform C# DateTime into Python datetime
AlexCatarino