Update README.md

Made Predictions on more images

Made predictions on some custom images.

A look on test on custom data

Trained on the full data set, saved the model and loaded the model.

Added summary of week 3

done prediction plotting for cat.

Updated and added building a model, callbacks etc.

Visualized validation data of dogs and added a summary for week 1

Week 1 task near to its completion, completed data visualization of cats, dogs is pending

Initial commit