Added README.md file

Author: Kirtan17

Attachment_Downloader/README.md

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+# Attachment Downloader
+
+The script downloads gmail atttachment(s) in no time!
+
+
+# Setup Instructions
+
+The script uses ezgmail module (to know more visit https://pypi.org/project/EZGmail/). To install please type the following command in your bash.
+
+```bash
+pip install EZGmail
+```
+
+Once the module is installed you will need to download credentials.json file by going to [developers.google.com](https://developers.google.com/gmail/api/quickstart/python) and clicking the Enable the Gmail API button (select "Desktop app" as OAuth Client in second step).
+
+Once you have credentials.json (in root directory of project folder), the first time you run the script it will open up a browser window asking you to log in to your Gmail account and allow "Quickstart" app to access it. A token.json file will be generated (in root directory of project folder) which your script can use to access your account.
+
+# Outputs
+
+## Output 1
+
+![image](https://user-images.githubusercontent.com/75886245/111307477-82e5d100-867f-11eb-8461-58abd04fa56a.png)
+
+## Output 2
+
+![image](https://user-images.githubusercontent.com/75886245/111307625-ba547d80-867f-11eb-8f3b-77ded9e72416.png)
+
+## Output 3
+
+![image](https://user-images.githubusercontent.com/75886245/111307771-e66ffe80-867f-11eb-8bbe-457675fcb963.png)
+
+## Output 4
+
+![image](https://user-images.githubusercontent.com/75886245/111307864-0273a000-8680-11eb-8400-3009dff8d7db.png)
+
+# Author
+
+Contributed by Kirtan Bhatt