Added OrderedDict.md

[Kamesh-Mishra]

Description

Added OrderedDict implementation in python

Fixes (#1)

Type of change

Choose one or more options from the following as per the nature of your Pull request.

• NOTE: These boxes can be checked using [X]

• Bug fix (non-breaking change which fixes an issue)

• New feature (non-breaking change which adds functionality)

• Documentation Update

Checklist:

Please tick all the boxes that are fulfilled by your Pull Request.

• I have named my files and folder, according to this project's guidelines.
• My code follows the style guidelines of this project.
• My Pull Request has a descriptive title. (not a vague title like Update index.md)
• I have commented on my code, particularly in hard-to-understand areas.