added a script.py file

[irvincardoza]

Users are finding it difficult to install requirements.txt file due to various issues like versions etc. It is also hard to find errors with many files in use

The script.py file makes downloading packages from requirements.txt easier. This script takes pip list packages as input, strips data and compares the packages downloaded to the required packages and tells us what is missing. Have also added a feature that adds a "pip install" before the package name and the version after so that the user can just copy paste the command into terminal and download missing packages.

this is output
missing packages:
pip install {name} == {version}