implement MOG in 2D case

1. Generate sampling points from a 2D Gaussian distribution
2. Generate sampling points from a 2D Mixture of Gaussian (MOG) distribution
3. Estimate parameters of generated data via step2 by using the E-M method
4. Plot iteration results

1. implement MOG in n-D case
2. add regularization term

1. Programming lanuage: python
2. Plot the results in matplotlib