softmax_estmating_parameters

Estimating the thetas for Softmax Regression (Multinomial logistic regression) using

1. Gradient Descent,
2. Stochastic Gradient Descent
3. Mini-batch Gradient Descent and
4. Newton Raphson Method (using Quasi Methods) and Backtracking Linesearch

Notebook does not use Scikit learn's functions but I have coded all of them into the notebook. All references are also mentioned. Give it a try and report any bugs.