[Ch4Nb11] Modified code to resolve windows compatibility

1.   Specified the version for installation of fastai. (version==1.0.60)
2.   Added dependencies for windows user such as  "from zipfile import ZipFile".
3.   Added try except block for windows and colab users.
4.   Specified the path for downloading files for windows users.
5.   Changed the number of epoch in 'fit_one_cycle' function to increase the accuracy of the model.

Author: KUMAR-APURVA