Update README.md

Author: ashutoshdebug

README.md

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 First we need to create database and tables for to store our data, that's why we have to run CreatCreating Database(Room_Managmenent_System).py. This will create required database and tables on our database server.
 
 Then, we can run Main Program.py. It has many features which are required to manage a hotel. In future I will try to add some more feature. Till then, enjoy :)
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+I have used these modules in these files, so kindly ensure that you have all of these modules installed in your pc:
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+mysqlconnector: Connects MySQL and Python and then we can use MySQL in python also. Module link: pip install mysql-connector-python
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+tabulate: This module helps to showcase results in tabular form in python: pip install tabulate. For different types of table please refer this link: https://pypi.org/project/tabulate/